Marlin firmware can not be compiled

Hello forum community I am new here, I have owned two 3d printers for about 4 years, both running Marlin.
Now to my problem:
I can’t manage to create Marlin for a SKR BTT 1.4. About arduino ide does not work for 32 bit board and in VsCode I only get errors because he does not know the board.
I have also searched Youtub but unfortunately without success.
Marlin cannot be set so that it runs without errors.
One more thing about me, I’m not a computer scientist, but I’d be happy to send you screenshots if it helps.
Maybe someone can help me to set up the board correctly.

Translated with DeepL.com (free version)

This support is only for firmware created on this site.

If you are building Marlin from source code yourself, you’re better off here: https://marlinfw.org/