[FrankJ]

In a former life time, I TIG welded steel & aluminum with the same equipment. Aluminum generally needs a bigger welder, a HF starter & is pickier with the shield gas.

MIG is slightly different. Since aluminum is softer, you generally need a spool gun rather than having the wire feed in the welder so the wire does not kink.

As previously stated. Have an expert help set up the machine, advise you what you need. & teach you how to weld. The thinner the pieces you are welding the more difficult it becomes.