Good to hear that you are getting yourself on the mend.
Since you can't play sax right away, I have found that an arranger keyboard is a good way to keep up, because it requires no weight on your body to handle, by learning chords one can use the built in midi loops, using the split keyboard left hand to hold the chords, right hand to play the melody and improvise.
Even the simpler $200 Casio keyboards have some decent accompaniments. One can experiment with different beats.
For example, a very familiar song,
Shout to the Lord works well using anything from a Lambada beat to even disco Cha-cha, Rhumba, etc. By slowing Cha-cha from say 130 beats to 90, the layering of the midi loops allows one to start off simple, then build. It is interesting how the mariachi trumpets, trombones and even flutes / saxes can add colour at cadence ending phrases.
One can also use it to build background backing tracks for sax solos. Connect up output to say, a stereo or multitrack recorder.
So effective are they, that I was leading the music for our Salvation Army Corps church service, which was prerecorded as a video for Covid, uploaded to YouTube. I was using a Korg EK50 patched into the sound system. We decided to use Public Domain Christian songs (those published before 1922) to avoid copyright infringements.
One song I used (can't remember exactly which, was several years ago,) was a traditional published in the 1890's. The service was recorded on YouTube. Their AI mistakenly identified it as belonging to big industry. I wrote them an on-line detailed rebuttal, which they removed the alleged copyright.
(Just letting you know that AI isn't perfect and it can make false identifications.)
The Korg EK50 is about as low as I will go, because left in the building, it could be subject to break-ins and theft.
The difference with the Casios, say
Musician's Friend: Casio CT-X700 61-Key Arranger for $200 US is that the digitised sounds for some of your band instruments will not be as realistic as with a more expensive keyboard, like the Korg Pa600 ($1,300) or Pa1000 ($2,600). However, by avoiding the weakly digitised as solo instruments, one can still build a reasonable backing track, plus, use it to practise improvisation.