Broke the left lower tibia on my bike a year ago. In addition to the wobble board which was recommended PT, I do a bunch of paddle boarding. That was a huge help getting everything back up to speed once I got out of the boot. In fact not paddle boarding makes my ankle feel swollen and hot. I hate this time of year.
I've damaged both ankles enough over the years that when the doc was looking at xrays he called in some other staff and was pointing out the difference between the new break and the old ones. Keep riding and find something you like to balance on, you will want to do it for life and not just recovery.