Tone has more mechanical experience in his little toe than all of mine put together, and even I feel confident doing a brake job.
The way I learned was to have a friend help me out who knows what they are doing AND who has all the RIGHT TOOLS. Once you have someone show you, you'll realize that its really easy.
Or, you can take one of those community college courses to learn- Ive never taken one, but Im sure they cover a lot of the basics.
Just my 2 cents.