Ok Buddy, you want to do welding, I'll explain what I can. For some research, search the forum, I know I covered all the types of welding.
Keep in mind, welding is expensive as hell. When Im fabricating, I spend $20-$24 a week on Argon shielding gas. And I have a pretty decent size bottle.
TIG welding is the most precise, but the hardest, and most expensive. TIG welding is extremely versatile. Decent TIG welders start around $1200USD, and about $800USD used. I use an Miller EconoTIG, its about $1400-$1600USD. Then the bottle, which is rented, is a $100USD downpayment, and $20-$24USD for Argon refills.
MIG welding, is the easiest form, created just as good welds as TIG, and is cheaper. Its not quite as versatile as TIG, but as an amateur, you wont notice the difference unless you are welding thin shit. Some of Lincoln Electric's MIG welders are available as wire feed welders, thus you dont need Sheilding gas. MIG welders start at $350USD.
Anything else, post up. I'll help.