My recommendation for recovery from my experience would be to be patient and listen to your body. When I was right out of the hospital I could barely climb a flight of 6 stairs. In all honesty I didn’t want to climb them because it would make me feel uncomfortable and that would lead to a shock. In essence, I was fighting two battles.
Fast forward a year later and I’m putting in 23,000 steps on a fairly regular basis. No issues except a stray spike in heartbeat, but easily corrected.
I didn’t feel safe driving for a few weeks after my last shock, and still stay off the roads for everyone’s sake if I feel more susceptible to a shock.
When you exercise, however it may be, try a smartwatch (if you don’t have one) to monitor your health metrics. I constantly watch mine when exerting myself more than usual. I can adjust my routine accordingly.
Hopefully some of this will help ease your concerns, and I’m glad to help any way I can. Keep fighting the good fight!