Riding with a wrist brace is horrible – couldn’t get on with it despite trying a few different ones. Get yourself something to strengthen your grip (I got some rubber eggs from Amazon) as it will be weaker. Do your physio as much as you are able to. You will know when you can ride again because before that it will hurt even when you move the bike let alone ride it.
Which bit(s) did you brake? I broken my distal radius and could ride again at 2 months (after injury) but not for long. At 3-4 months I can now do longer rides but if it gets cold and wet it aches like a git. I’d probably still only just be thinking about DH as opposed to technical XC though.
**EDIT** I also read some research which suggested taking vitamin c to reduce the likelihood of chronic pain syndrome so I did that just in case.