wakeup from deepsleep and show display

Hello Comunity,
I have a mkrfox1200 in deepsleep(waking up maybe every hour) and by pressing a button the module has to wake up and show some bla bla, maybe 5 or 10 seconds, and then get to sleep for the remaining part of the 1hour cycle.
Thats my idea....
Asking Google about interrupts i found a lot Articles , but im not shore if this way is the right one for me!
the code in the interrupt function has to be as short as possible, but i need various seconds and different methods, so the code is not very short.

i have here my testcode but it doesent work

#include <SigFox.h>
#include <ArduinoLowPower.h>
#include <SPI.h>
#include <Adafruit_GFX.h>
#include <Adafruit_PCD8544.h>
#include <OneWire.h>
#include <DallasTemperature.h>

Adafruit_PCD8544 display = Adafruit_PCD8544(5, 4, 3);

#define ONE_WIRE_BUS 7
OneWire ourWire(ONE_WIRE_BUS);
DallasTemperature sensors(&ourWire);


 long counter;




void setup() {
  sensors.begin();

  display.begin();
  display.clearDisplay();
  display.setContrast(50);
  display.display();
  display.clearDisplay();   // clears the screen and buffer

  pinMode(0, INPUT_PULLUP);
  LowPower.attachInterruptWakeup(0, showDisplay , FALLING);

}

void loop() {
 counter++;
 LowPower.deepSleep(10000);
}

void showDisplay() {
  unsigned long starttime = millis();
  while (millis() - starttime <= 2000) {
    sensors.requestTemperatures();
    float tmp = sensors.getTempCByIndex(0);
    display.setTextSize(2.5);
    display.setTextColor(BLACK);
    display.setCursor(0, 0);
    display.print(tmp);
    display.display();
    display.clearDisplay();
  }
  
}

can somebody help me???