Two years and counting. Symptoms have been ridiculously wide ranging, but in a nutshell, it's ME/CFS with a side order of PoTS.
The best advice is just to err on the side of caution. If you have any symptoms, avoid exertion. My GP told me it was fine for me to build up walking after a few weeks, despite still having horrible chest pains, shortness of breath, palpitations, etc. It wasn't. It made me worse. Going back to work after a couple of months because I thought I "ought to" despite being nowhere near back to health (frankly I was embarrassed to be off for so long) was what really tipped me over the edge I think. I'm still unable to work now.
Onset can vary by person - some had a mild infection and felt they were almost fully better, brought in exercise, and then had a crash that was effectively the onset of long covid. For me it was more a case of symptoms just never going away.
I'm sure you'll be fine though OP, and I'm not looking to scare! But if I could turn back time knowing what I do now, I'd just realise that it's best not to treat it like a cold where we can ignore symptoms, carry on as normal, and feel assured our bodies will recover smoothly. For a lot of people it's much more taxing on the body than that, even if it isn't immediately obvious by symptom severity (there's lots going on behind the scenes with covid!). Just avoid any exertion until you are fully better. If you're like most, that'll only be a week or two. If the infection lasts longer than that, it's even more important to be careful, and just be patient till it eventually passes. It's drastically easier to rebuild strength and fitness in a deconditioned but healthy body than it is to do the same with a body that was never able to recover, and no longer functions as it's meant to.