Hi
You are in the same boat many of us are Everlast manuals say what.
Try this site of some basic tig info and google tig info using different wording and you will find helpful info to pick from. no one has a very easy set up. But you can fine what the knobs do and how it effects welding.
here is one
http://www.millerwelds.com/pdf/gtawbook.pdf

have fun
acourtjester.