Patricia, I checked out your profile and saw that you've been dealing with adjustments, sounds like for years, around physical disability. I haven't been through what you've been through and haven't made it to permanent disability. However, I had a run-in with Lyme disease, which pretty much put me on my back for two years. I had very little energy and normal things were challenges. No more hiking (walking to the mailbox was a challenge), which had been a great source of enjoyment for me. I'd been working on a novel and that had to be scrapped because I didn't have the brainpower. Luckily, I enjoyed reading, though at times even that was a strain. I seriously thought about taking up knitting or some other activity that only required eyes and small movements. This is all to say, I understand the challenge of continuing to enjoy life when the usual things that give us joy or solace are no longer possible.
In my case, I would think about the essence of something. With hiking, I enjoyed being outdoors, so simple trips to parks or outdoor festivals (renaissance festivals being good ones) was my solution. I appreciated the beauty around me (lived in the country) and kept a record of animal sightings. I couldn't afford to own an animal but agreed to host some animals for a rescue organization and the organization provided supplies. I started with kittens but they were to rambunctious. Instead, I became the host of mothers who had just been spayed went until they were ready for adoption. To come up with these things, I had to reject moping and engage ingenuity. If part of one's disability includes depression, it may be helpful to ask a friend to brainstorm with you about how to keep some of the things you used to love in your life even in a little way or how to find new things that keep life fun and make it seem worthwhile.
Another key, for everyone, is not to over-obligate yourself so you have time to do the things you know give you pleasure.