Regardless of trajectory, always use the same stance, setup and grip; just change your ball trajectory and swing length
75% of your distance comes from your wrist hinge and swing plane, so try hitting drivers from your knees to practice this theory
When you begin your puttting practice start by dragging two footers into the cup without a backswing, this is going to make you concentrate on keeping the face square and give you the confidence of watching balls go into the hole