Any of the major and most likely even some of the recent Chinese made off brands will have a 'kit' which will adapt to your welder. What it amounts to is a replacement lead liner or a complete new lead, a gas relay, a gas supply hose and usually a rudimentary gas regulator. The instruction sheet will show you how it's assembled plus tell you to reverse the current wires inside. You will then either need to buy a C-25 tank or lease one - bigger is best. The smaller 20 CF tanks are good only for about an hour of welding - and you only forget to shut it off once because most welding suppliers aren't open weekends (Tractor Supply is expensive). I'm paranoid - I shut mine off most any time I lay the lead down. Not inexpensive, but I really do NOT like grinding weld spatter from flux core.

What really helps is a night school or training course. I took a several night course over a month and learned to lay an acceptable bead by just burning their wire on steel in all positions - and while far from pro perfect, a heluva lot better then I could do before on my own.