Tennis is a sport that can be played that requires little equipment and is safe in that you can play by yourself of with a partner keeping your 6 feet of social distancing. That said below is a link I would like you to check out. It has a ton of things to do on it. Once on the site just click the tennis at home tab and pick an instructional video or activity that interests you. This site has skills drills, nutrition information and brain stimulating activities like crosswords on it all tennis related. Hope you like it!!
https://www.usta.com/en/home/play/adult-tennis/tennis-at-home.html
