I have been taking riding lessons for a long time and one of my cousins wants to learn how to ride. My horse is quiet and cooperative when on a lunge line. this will be my first time teaching someone. Very casual. Just walk trot stuff. She‘s ridden before but is still new to the sport. Any advice on teaching? And tips on what to avoid when giving instruction? I’m going to be very nice of course. One more thing. My cousin is light, probably around 100 lbs. if she is bouncy will it hurt my horses back? shes a big horse and is in shape so it’s probably a stupid question. Thank you all so much. Any advice is helpful.