Hi Eladro, just remember, Google is your friend. You'll find many bicycle mechanic videos on youtube. As far as your drivetrain is concerned, just check out this website ---> http://bicycletutor.com/part/drivetrain/

Also, there's a bicycle mechanics forum as well as this commuter forum. I'd bet they'd love to see your photos.

You might check these links too:
http://westtownbikes.org/about
www.workingbikes.org/
www.therecyclery.org/
If you volunteer, you just might be able to squeeze your bike into the assembly line, where there are plenty of mechanics.