I was interested in starting to play with wine and maybe even build a few functions for it...but then I realized that it's low-level coding,
What do you mean by low-level?
Correct me if I'm wrong, I could be looking at the wrong files :S.
Are you looking at assembly files? Those have .S extension. Methinks you should focus on the C sources first, which have .c extension.
Cheers, Kuba