Sorry to hear about your crash. I'd think the most important thing is to fix whatever issues arose from crashing. If you have PT to do do that. Then start doing some basic strength work pushups, pullups etc and gently climbing without causing too much pain.
I’ve never had an injury like this but I think a good general rule is: Don’t climb if your injury hurts. Don’t push it. As for training, ask doctors or others who have experienced the same things. Good luck! I hope you can climb and bike again soon!