Go to trade school or vocational college and talk to the welding instructor. You don't want or have time for the entire welding course. You just want to MIG.
Maybe you can get separate training on JUST THAT. The trade school is a business so either they will take your money or they won't.
Or, you got to seek out a welding shop and ask them "HEY BUDDY, I WANT TO TAKE AWAY FOOD FROM YOUR TABLE SO TEACH ME EVERYTHING YOU KNOW"
You know how that discussion is going to end...
Punches to "your" head.
Me, if I go out and buy a MIG welder, you can be sure I will experiment with it FIRST. Or read a book or watch a YouTube video or something.
Some people can dance and some people can't. Kind of the same idea. Maybe you got to learn how to STICK WELD FIRST. I can't say. Very possibly the technique is the same. I never made it to MIG or TIG welding cause I could not do stick very well(as I was a "south paw" and all the booths were for right handers...so vision was my main problem as the smoke was pulled into my shield clouding my vision so did not too bad welding BLIND.
. There is a SKILL to everything that requires knowledge first, otherwise you is just making sparks and a $hitty welding job at best..
It is not something learned overnight. Do 100 miles of bead welding and by the end of it, you should be DECENT.(if you are doing it Right) If you are doing it wrong then you have picked up a bad habit.
The guys in trade school weld for 9 months That is a lot of welding....that is just practice just learning one skill in any position.