I don't know you and I don't know your mom. I know my mom. I know it can be hard for us when our mothers over-share advice and opinions. Keep in mind that your mother has feelings too and she probably just wants to be involved in your life. That said, I would consider getting a video camera. Have your mother record your ride. Her commentary will be caught on video too. Then you can both watch the video. She can see how much her commentary runs. You can see if she is seeing things that you are missing while you are controlling the horse.