I wish I was a mod because I would move this to Audi/VW Technical forum. But I'll give you a link and you can find over there.
Advice from me- start out small, ask your self, How fast do I want to make it? How much money do I have? Things like that. I'm guessing you don't know much about cars, but thats why Tamparacing is here to help Learn/Teach about cars. Goodluck.
-Jeremy.
Here is the link-
Audi/VW Tech