1. Will that one course be sufficient to find a job?
Given the market today, I’d say maybe.
When I got into tech writing back in '83 or '84, you didn’t need a course because none existed; at least, not in my area. Now you can take two-year college courses leading to a certificate (I used to teach in such a program), and in some schools in the US, a degree in tech writing. Many employers whom I’ve spoken with refuse to hire any tech writer unless he or she can show a piece of paper stating that the person has completed a program in tech writing at some school somewhere.
So…one course? Maybe with your communications background, you’d be OK, but I won’t say more than that.
2. How does one get started in technical writing?
Find someone willing to hire you, really.
Make your resume show off your technical capabilities and writing skills, if you can. If you’ve worked in a tech company before, or in a tech division of some kind, play that up. If you’ve done any work writing for business before, play that up. However, don’t emphasize any poetry or fiction writing.
Do have some samples ready for an interview. Make them up if you have to: present a set of instructions for programming a VCR. (An old example, but I’m sure you get the idea.)
Tech writing interviews are strange things–I’ve had a three-hour grammar test sprung on me unexpectedly, been asked to write a procedure for tying my shoes, and been given fifteen minutes to write an explanation of how an internal combustion engine works. All during an interview. I’ve dragged along previously published manuals. And sometimes we’ve just talked about work for anywhere between one and five hours.
If after all that, they like you–well, you might get an offer.
3. Is there an income difference between contract employment and a permanent job?
Yes, usually a great one; because as others have pointed out, you get no benefits. I used to set aside a chunk of what I got paid “just in case,” as well as for taxes and such. But I charged double what I’d get on an hourly basis from a permanent job, and no client ever thought it was unreasonable.
I could probably comment a lot more on this topic, but I have a full afternoon. I’ll return though.