I'll just X 15 it (or what ever number we're up to)
220 MIG would be the best to start with. You don't want to get something that won't do all that you want it to, then have to buy another welder later. Get a good name brand Miller, Hobart, Lincoln... Watch out and don't get one with a low duty cycle.... 75% or higher on the max setting would be the lowest I'd go.
And as was said go ahead and get gas, not flux core.
One of the best things to do is to take a welding class through a community college or tech school. Many have evening classes. This will teach you the basics and give you some experience on different welders. And sometimes get you a student discount at the welding shop when you go in to buy your welder.
A huge plus is to spend the coin to get an auto darkening helmet. Makes learning much easier, and welding in general.
That's about all, for now anyway...