The parent commenter should get an Altair Z80 emulator with CP/M 2.2 and begin writting stuff in assembly.

Even a simple Tetris would be a daunting task.

He could even try high level languages such as T3X, which is very Pascal-like to my eyes in order to be familiar with CP/M 2.2 and after some months I would switch to Z80 assembly in order to write stuff for CP/M.

These AI's would be clueless about T3X OFC, or almost, because of the nasty scrappers. Still, it would be an ideal exercise to avoid the AI completely. You learn by the book. Literally.