+1 on community college welding class.
Don't buy a machine until you have some training. The class I took started us off with acetylene torches, then MIG, then TIG or stick, whichever you were interested in.
Everyone says MIG is easier, but I disagree. TIG allows you fine control of the puddle so you can adjust as you go. MIG is easy in that it is point and shoot.
Point is, you won't know what you want until you get some training and you can know what you prefer.
Also, much cheaper to learn on someone's machine, metal and consumables. That's probably your best way to getting it right the first time. Good luck!