It's probably best not to throw with a partner, unless you are fine with either infecting, or being infected, by them. This virus exists on surfaces for hours. Use a net instead.
If you are lucky enough to have a gym at home then you can lift there. Hitting off a tee is always good.
My eldest is still away at college. He is a weight room devotee, so he doesn't know what to do with himself. He isn't even allowed to use the cages.
Youngest son (HS) can't work out except at home. Right now I am hitting him Fungos and BP, and he throws into a Bownet. We have decided to stay away from friends as practice partners.