Bro, you need to see which attributes of your player are lower and then choose a drill which trainers those attributes and has no attributes of GK.
There are only five Drills which don't have any attributes of GK.
1) Press the Play
2) Slalom Dribble
3) Use you head.
4) Piggy in the Middle
5) Stop the Attacker
Decide among these three Drill which will be best for training SA and new positions.
Generally press the Play is best for Strikers and Mid fielders as they have low defensive stats and Slalom Dribble for defensive players as they have low attacking attributes.
I hope this clears all your confusion.