There's a Mig welding forum where you may find some useful information.
Personally I would spend a bit more and buy from a proper welding company who can properly support their products and give excellent after sales service. My favourite is R-Tech I've had 2 Tigs from them, they are an excellent company to deal with.
Biggest thing for setting up a mig welder is it must sound like bacon frying, you get this by a balance between the amps set and the wire feed.
Find a sheet metal place near you and go in and ask if they have some small scraps for you to practice on. Offer to take the scrap back so they wont lose their scrap money, it works as i dud this when i wanted to get my hand back in some time back.