I'm thinking that if you were my daughter, I'd advise you to sell him and buy a different horse in a year when you're ready to ride again.
He is young and it's not a big surprise that he acted out. Until he has more riding time - and possibly training - he will still be a handful for you even if you were riding now. In a year, you will be unused to riding and he will be used to having a pretty free schedule, so it won't be better and it might be worse for you.
In summary, after a year you will have spent money on board and possibly training. Unless this is the only horse in the world for you, you would be better to spend that money on a new horse that's been there and done that in the discipline you're working toward.
And, I'm really sorry about your injuries. That is just so rotten luck. I hope you heal very fast -- eat lots of cottage cheese or cheese curd - they both contain something called K2, which helps form the webbing that is the beginning of new bone growth. It works with calcium for faster, stronger better repair of fractures!