i wanted to paint my stock se sport rims blk to match the car

what preping and painting steps do i have to take for it to come out right?

everytime i paint something i [censored] it up

2000 SE SPORT V6 MTX BLK MODS: KKM INTAKE DUAL EXHAUST/NO RES BOSCH+4/CHIP SHORT SHIFTER/INDIAGLO'S HVAC/DASH MESH GRILL/CLEAR CORNERS/EYELIDS