Dont listen to phil with his .8 wire and 180 amps bruce. He has had years at it so can get away with it. Stick with the .6 , there is nothing wrong with what you are doing for first attempts just keep practising and as phil said play with the amps/wire feed. One thing not touched on here is getting yourself comfy, I always try to position myself so my elbow is resting on somethng which helps steady the hand, Sounds silly but helps.
bob
who stole the mig thread.