I decided to go back to having riding lessons. This morning was my 2nd and I have to say I am finding it quite hard. Apart from my body complaining with lots of sore bits I find myself quite nervous. As you know Dolly is only 13.2hh and to be back on a big cob who is very forward going in canter has me wondering if I am right in the head. I feel all over the place, canter work, the cob mare falls in on both reins which makes me feel I am about to fall off. She is stiff and getting her to go straight just does not happen. Lady who is teaching says i am doing fine but I know in myself I am way off the rider i used to be. I also get very tired, came home and fell asleep. I am pretty sure the mare has joint problems, she is not young but strong. What should I be doing to help me get my balance back. ?