· I am a beginner I want to learn HARDWARE….what should I do first…?? My second question is that net can help me? how?

Many Community Colleges offer night/weekend classes that will start you on the right path. At mine, you don't have to be enrolled as a student, but they offer these types of classes as "Lifetime Learning" and anyone can pay the fee and sign up.

The net could probably help, but I think its useful to have one-on-one with an instructor that can show you things in person.

There are literally thousands of books at the bookstore/Amazon/library on the subject. Start there. Having a second computer to take apart and play with is helpful as well.