The hardest part is always "starting up" that engine. It takes some time to develop a foundation on any programming language, especially your first one. I'd suggest some of the various "beginner tutorials" that you can find in the AddOn Kit and around websites such as WoW Interface. I know many people have posted help about this very topic, so I suggest you search for those. I also recommend looking for some basic addons out there already made. A key part of learning is by example and so you can see what other people do to help yourself out.
Start simple and you can increase your knowledge from there!
www.wowprogramming.com
www.wowwiki.com
These are both great resources for programming. You can also ask as many questions as you would like here and at WoWAce.com
Good luck!