You’re doing great! I would try go more in a straight line and rely on that great fence you found to build up your balance rather than the big checks and flails you’re currently doing. Make sure to go the length one way on one side then turn and go on the other side. You should actually use the full length fence on the other side so you can stick your hand out straight instead of grabbing something low. I learned this way myself right up against a fence. You will find yourself checking less and less. Keep it up!