It’s three months since I broke straight through my radius and ulna, and had a plate put in. I’ve only just got back to gentle road riding. My biggest problem, once I had gotten over the long lasting stiffness in my wrist and elbow, was that I couldn’t get a strong enough grip on the bars and it was I couldn’t use the brake properly.
The best advice I can give you is to take it slow and let things get better/looser by themselves.