Rest is so important. There's a delay often between the acute infection and the onset of long covid. If you push yourself during the gap (pretty typical because you get excited about not feeling like shit anymore!) you might raise your shot of getting a post-viral condition. My advice for anyone I love who's getting sick right now is to plan an extended convalescence of like a month of reduced activity, even if you feel okay. Just couch potato and chill like your life depends on it.