Hi, Mike
I see that you have no caregiver - OCF can't be there physically, but we can be your cheerleaders online.
This is a hard time of year to be coming out of therapy as it is wintery and dark out. Are you able to be a little bit active yet? I believe that my husband was able to recover as well as he did because of our daily walk with the dog. He was very frustrated by the two steps forward and one step back of recovery.
With the idea of returning to work, you might think about setting a 'work' schedule for yourself: maybe start with half an hour of reading related to your field, sitting up. Add a bit every other day. It will give you a schedule, and begin to build up your stamina without overdoing.
On a positive note, you have completed treatment that is at the limit of human endurance, and you are recovering. Spring will come, and you will be ready for it.
Maria