Training with broken wrist

Hi All -

I recently planned to do my 2nd sprint triathlon, this one being more competitive. Training was to begin Jan 3, but I broke my right wrist last week. The cast will be on until late Feb, with the race being May 1. I struggle the most with swimming. Is there anything I can do in Jan and Feb to prepare me for the swim depsite having a cast on? It is only a forearm cast.

Thanks!
Scott