Originally Posted by
dengidog
The problem with a lot of sites that I've visited is that they assume you have a working knowledge of the tools or some mechanical abilities. I don't.
This is going to be a tough handicap to overcome and a real book might be a better start. "Bicycling Magazines Complete Guide to Bicycle Maintenance and Repair" is a good introductory manual. Your location says Mexico so is there a local bike Co-Op or similar in your city? They have tools and expert help to show you how to do the work.