My pals and I never hit off artificial turf, we consider it cheating. It's fine if you want to pratcice the driver, but for irons its worthless. Invest your time better on real grass.
When I am on the course, I turn everything off. The only thing I am focusing on is my golfswing and making clean contact. When your on the pratice range, memorize your hand and feet placement. Memorize and burn it in. When your on the course, don't hold back and trust your swing.
I have a friend that just started and it's hard for him to "trust" his swing. Go into the swing knowing your going to hit a great shot. If you don't, shake it off and repeat the process. A great attitude goes along way to good golf.
Peace g's.