So sorry to hear about your injury. Hopefully it will feel better without the hardware.
We have a spin bike and my DH was able to use it two weeks after he broke his collar bone and paralyzed his leg from the knee down. Ours was a freeby from a local gym my husband has done several projects for. It is pretty much a first generation, plain-Jane model but it is bullet-proof and he loves it.
A spin bike seems more stable than a bike on a trainer. Do you have access to one?