The theory of contrary opinion.
Will probably going to get a ton of shit over this but here goes . . .
First, get the best therapist / rehab person you can afford. And listen to him or her.
I would adapt a holistic approach; take the time to do a deep dive into the mind and the body (not weights).
Personally, if it were me, I would do ~ three thirty minute walks per day.
Stretch (yoga, whatever) for and an hour a day.
Meditate in two, twenty minute sits a day. (More if you can; the magic starts at about an hour.)
All this the time you probably spend in the gym each week so me thinks you have the but perhaps not the inclination
I would return to a more balanced diet, ‘normal’ diet with a reduction in protein, and up your fruit and veggies.
Drugs. I would do a straight, honest TRT. All the other stuff is up to you but I would keeps things as ‘normal’ as possible, let your body heal itself, this is what it does best without throwing the kitchen sink at it.
And any muscle you lose will be gained back faster than you can possibly imagine. You are well built, heaps of muscle accumulated over a long period of time so your body will quickly regain anything you lost in the interim.
Reduce as much stress in your life as possible. Stress, anxiety, depression takes a horrible toll on the body . . . you do not need this now. Wait till you get back on the juice than you can go on a hunting spree
Not knocking everyone else’s recommendations, this is just my opinion.
I wish you a speedy, full and fast recovery which I am sure you are more than capable of. Your a smart guy, now get after it.