How to install 3.5 inch display on pi 4?

Hello can someone help me install a 3.5 inch display on the pi 4 64bit pi os? I've already tried the script but it doesn't work: https://github.com/tux1c/wavesharelcd-64bit-rpi When I run it the Rasberry pi restarts but the image is not displayed on the 3.5inch display. It just changes from white to black.

What OS have you used = Bookworm or Bullseye? If you have used Bookworm it defaults to Wayland and the install script is for X11 (Bullseye uses X11).