Start from playing the preset [sys] games and change around the codes. Download other's games by entering their public keys available everywhere in this community, then do
? "Hello World!"
and run.
Well, you learn by practice and dedication. I know I wanted to have all the answers right away but it takes time,start simple and follow the examples in the manual. Dont just read, do them too.
Check out YouTube if you can. Look for PetitProfessor3D. He made some tutorials for beginners. And don't give up. it's always hard at first but it's rewarding when you figure it out.