error: expected unqualified-id before '{' token

So I am doing a project with the TF Mini Plus micro-LiDAR running through an Arduino Uno to measure topographic change in dunes. The way I have it set up, it is running in tandem with an RTC and saving to a microSD card with the Gikfun SD Card adapter. I am very very new to coding and even newer to Arduino so I know my code is probably wonky, but I keep getting this error message ‘error: expected unqualified-id before ‘{’ token’ at line 34/35 before the void_loop section. I am not sure what this is, so any help would be appreciated. Additionally, due to my lack of knowledge with coding any other suggestions or help would be appreciated. The way I tried to code it was to have it take readings from the TF Mini Plus, write those readings to a txt file on the SD Card and include the date/time data from the RTC. Any help is greatly appreciated, the code is below! Thanks.

/*
  This program is the interpretation routine of standard output protocol of TFmini-Plus product on
  Arduino using a RTC and SD datalogger.
*/

#include <SPI.h>
#include <SD.h>
#include <SoftwareSerial.h> //header file of software serial port
#include <DS3231.h> //DS3231 library
#include <TFMPlus.h> //TF Mini Plus Library

SoftwareSerial Serial1(2, 3); //define software serial port name as Serial1 and define pin2 as RX and pin3 as TX
int dist; //actual distance measurements of LiDAR
int strength; //signal strength of LiDAR
float temprature;
int check; //save check value
int i;
int uart[9]; //save data measured by LiDAR
const int HEADER = 0x59; //frame header of data package
const int chipSelect = 4; //SD card CS pin connected to pin 4 of Arduino
DS3231 rtc(SDA, SCL) // Init the DS3231 using the hardware interface


;
void setup()
{
  // Setup Serial connection
  Serial.begin(9600); //set bit rate of serial port connecting Arduino with datalogger
  Serial1.begin(115200); //set bit rate of serial port connecting TFMini with Arduino
  int Initialize_SDcard();
  int Initialize_RTC();
}

{
  void loop()
  if (Serial1.available()) { //check if serial port has data input
    if (Serial1.read() == HEADER) { //assess data package frame header 0x59
      uart[0] = HEADER;
      if (Serial1.read() == HEADER) { //assess data package frame header 0x59
        uart[1] = HEADER;
        for (i = 2; i < 9; i++) { //save data in array
          uart[i] = Serial1.read();

          Write_SDcard();
          delay(1000); //Wait for 1 seconds before writing the next data
        }

        {
          void Write_SDcard() {
            // open the file. note that only one file can be open at a time,
            // so you have to close this one before opening another.
            File dataFile = SD.open("LoggerCD.txt", FILE_WRITE);

            // if the file is available, write to it:
            if (dataFile) {
              dataFile.print(rtc.getDateStr()); //Store date on SD card
              dataFile.print(","); //Move to next column using a ","

              dataFile.print(rtc.getTimeStr()); //Store date on SD card
              dataFile.print(","); //Move to next column using a ","

              dataFile.print(dist); //Store date on SD card
              dataFile.print(","); //Move to next column using a ","

              dataFile.println(); //End of Row move to next row
              dataFile.close(); //Close the file
            }
            else
              Serial.println("OOPS!! SD card writing failed");
          }

          {
            void Initialize_SDcard() {
              // see if the card is present and can be initialized:
              if (!SD.begin(chipSelect)) {
                Serial.println("Card failed, or not present");
                // don't do anything more:
                return;
              }
              // open the file.
              File dataFile = SD.open("LoggerCD.txt", FILE_WRITE);
              // if the file is available, write to it:
              if (dataFile) {
                dataFile.println("Date,Time,Distance"); //Write the first row of the excel file
                dataFile.close();
              }


              {
                void Initialize_RTC() {
                  // Initialize the rtc object
                  rtc.begin();

                  //The following lines can be uncommented to set the date and time for the first time
                  /*
                    rtc.setDOW(FRIDAY);          // Set Day-of-Week to SUNDAY
                    rtc.setTime(18, 46, 45);     // Set the time to 12:00:00 (24hr format)
                    rtc.setDate(6, 30, 2017);    // Set the date to January 1st, 2014
                  */
                }

                // Confusing section!!!

                void Read_TFMini()
                {
                  check = uart[0] + uart[1] + uart[2] + uart[3] + uart[4] + uart[5] + uart[6] + uart[7];
                  if (uart[8] == (check & 0xff)) { //verify the received data as per protocol
                    dist = uart[2] + uart[3] * 256; //calculate distance value
                    strength = uart[4] + uart[5] * 256; //calculate signal strength value
                    temprature = uart[6] + uart[7] * 256; //calculate chip temprature
                    temprature = temprature / 8 - 256;

                  }
                  {
                    void Read_DateTime()
                    // Send date
                    Serial.print(rtc.getDateStr());
                    Serial.print(" -- ");

                    // Send time
                    Serial.println(rtc.getTimeStr());
                  }

                  void Read_TFMini()
                  {
                    Serial.print("dist = ");
                    Serial.print(dist); //output measure distance value of LiDAR
                    // delay(1000);
                  }

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Watch the placement of your braces { }

35 { <———<<<<
36 void loop()

Ok I reformatted it thank you. Where would I need to move the bracket in order to structure it correctly?

When you’ve moved the brace around, you’ll want to fix this

  int Initialize_SDcard();
  int Initialize_RTC();
}

It could be worth your while working through some of the examples provided with the IDE.

Line breaks in your description would be helpful too.

A function has this format:

void setup()
{
// do your setup() stuff
}

void loop()
{
// do your loop() stuff
}

void myFunction()
{
// do your myFunction() stuff
}