I took the class at the Art Center a few years ago. It gives you a little intro to stick, MIG, and acetylene, then you can make a little project. I had kind of a feel for it since I'd had to have a mower part welded once. That always makes me decide to learn how to do it myself and picked up a stick welder. I put a 240V circuit in the garage to run the machines. I have an acetylene, stick, MIG, and spot welders, and a plasma cutter now, and I do little things with plans for some projects. I want a TIG one of these days. Yeah, I'm eat up with it.
Galvanizing is a coat of zinc on the steel; there are a couple of ways to apply it. Zinc oxide gas is produced if you go to weld it. As long as you have good ventilation and can avoid breathing it you'll be ok, but it can mess you up, so it's best to avoid.
There's a place on 25th west of Keystone called Steel House where you can get scraps and cutoffs cheap.
The steel house is easy to deal with.
Galvy fumes will mess you up. Ask me how I know.