How can I make a career in the solar heating / energy field?

I’m working in IT Helpdesk field and no longer interested in this kind of work. I can’t stand sitting at a desk in an office answering phones, e-mails and helping others with their technical problems.

I am very good with technology/computers and want to start a career in the solar energy field, preferably as a technician working with solar heating and energy.

How can I make this start?

What kind of salary would I be making?