drills you can use to learn to swing from the inside

take a ball and tee it up, now take another ball and place it 10 inches behind the teed ball and 3 inches outside your target line, now place one ten inches in front and 3 inches inside your target line
hit the ball in the middle while imagining creating an X between your swing path and the line of the 3 balls. and if you hit any of the other three balls you are coming over the top, this drill gives instant feedback