I do what I can each day ,some days or even parts of days ,better in the mornings tired in the afternoon and pick up a bit later ,I do push myself though and try not to give into tiredness,even if means walking and stretching only a little bit on those days

Speaking as someone who exercised vigorously. I walked 6 miles a day in 90mins, that's a round trip, worked out with free weights, had a treadmill at home, gym membership, loved outdoor activities. Always the 1st to volunteer at my kids schools. Girl scout leader, boy scout mom, i was there for all their activities, athletics, math & science olympiad, school chior, art and singing competitions, school trips, pta. Supermom. I wouldn't change any of it.
MG makes you regroup, reorganize and take stock of the time you can do things in a good healthy manner.
Stay hopeful 😎

I have seronegative generalized MG as well. I have great difficulty with repetitive tasks. Even folding laundry has recently been an issue. But when I am not having a flare I have in the past worked with my physical therapist to carefully get back into exercise. The best form of PT for me has been finding a physical therapy office that has a pool & I get some gentle exercises done in the water before moving on to exercises out of the pool. If I have been stuck in bed after a PT session for a few days then I know I have overdone it & we modify or even take a break for a week or so before starting again. This isn’t an easy disease I know & I am sorry you are struggling.