you try my path trainer. When you hit the ball without hitting the obstacle you will be on or under the plane. Then you can see in video what is actually different.
The first one is one I take to the range. The rubber tee is the obstacle and the white plastic is the anchor I place under the mat so I don't loose the tee when I hit it. The second is my setup at home where my mat has several holes for tees so I use one for the obstacle which is foam pipe insulation over a rubber tee. If you are hitting off grass you can use a large tee. Place the obstacle 8-12" behind the ball on the target line. Don't cheat by changing your foot alignment; keep your feet parallel to the target line.
Peter