I'm not an expert at all,but have had a few hints passed my way regarding wire feed.
If your beads are tall,your feed speed is too fast
splotchy or hard to get flowing,its too slow
try to angle the piece your welding so that its slightly down hill,point the gun uphill,tilt the pieces so that they form a V,instead of an L,and start at the high end,working toward the lower end with small side to side or half moon motions.
If you weld thicker stuff,try to warm it up somehow.
test your heat range on scraps of what you are gonna weld to check for penetration,too much,too little or just right.
little 110 migs will do a lot.