How do I become a technical writer?

People have said my spoken and written English is flawless. Someone mentioned that I should get into technical writing for a while, because it earns quite a bit of money. Honestly, I think I would enjoy myself quite a bit.

If no one noticed, I’m one of those people who wants to do as many things as she can in her lifetime, and I often change what I’m doing, be it work or a hobby.

What are the necessary requirements for entry into that field?
Where would I search for openings in my town? [Huntsville, AL]
What exactly do technical writers do beside write manuals?

Feel free to add any knowledge I may have not known to ask. I feel others will benefit from this question.

Thank you!