I started with a stick machine about50 yr. ago. My sons went into body work some 30 yr ago and they bought a Mig machine. First time I used it I swor it would never do the job BUT practice is what ti took so for 30 yr. I have used Mig the stick machine was sold awhile back. I don't think anyone can tell you how to really use it just USE it. Its very hard to hurt it and I WOULD NOT use flux core wire. Tried it hated it. went back to gas. As was mentioned untill you get used to it try metals of same gauge but weld overlap just practice. Good Luck and most of all HAVE FUN.