I wanted to learn blacksmithing too, and when I looked into it the local blacksmith had just decided not to coninue having classes. So bummed, what a fun thing to learn!
A mig welder w/gas is the easiest to use. I was taught gas welding first, then brazing (welding with brass) then mig. I was able to teach myself stick. (I still ask a pro what rods to use) Never had access to a tig so never learned one.
Enjoy! Its good stuff to know. And remember, with slag you drag!