Yes, I meant microcontroller. Arduino UNO is a microcontroller board with an Atmega328 CPU (or processor, as we called it in old days before of the single-chip processors).
You need to be careful with the 5V IO pins of the Arduino UNO, as the controller of your display is for 3.3V data lines, if there is no level converter on the display board; there is none on the picture of the 4" display, but there seems to be a series regulator for VCC.
I am not familiar with tutorials. Arduino has tutorials, and Adafruit has a lot of information available.
I just found the post I had in mind: Problem with 3.5" tft display with ILI9488 driver.