Welding wire ?

Practice on some old sheet metal. Start with a medium setting and weld some spots. If you burn through it's too hot, turn it down a notch. Start the wire feed at a medium setting also. If the wire gets longer as you weld slow the wire down. If it is burning back into the tip, speed it up. You will need to clean the weld splatter from the gas shield (the tube that circles the wire tip)
when it builds up. You can use a screwdriver or a small needle nose pliers to break the chunks of weld loose from inside the tube. I really do think practice is the key. Pay attention to what the weld and the wire are doing and adjust accordingly. You'll do fine. Toolman I will be away for a while(supper time)