Since you have experience with Klipper Ender 3V2 install problems you probably know, what you need.
I would start here https://www.geeetech.com/download.html?download_id=49.
Choose the right schematics of your printer board and start building your printer.cfg.
Might be a starting point https://github.com/GusBricker/GeeetechA10_Klipper/blob/main/printer.cfg.
I guess configuring the extruder will cause some problems.
There is a thread here about A10x display problems How to diagnose why the Geeetech A10x display shows nothing.
Good luck, hcet14