So my boyfriend wants to get into trail riding but hes got a really bad foot/leg. Basically when he was younger his foot/leg started growing the wrong way so it wouldve been backwards. He got surgery to correct it but now he has chronic pain in it and cant put pressure on it for a long time. He wont be able to really put pressure in the stirrup on the left side or keep his heel down. Any tips on how to help him ride or types of barns to help him learn?