Hopefully you were able to enjoy that wonderful sun before winter came again...ugh. So a few more Great Quarantine Art Adventure prompts for you:
Search for Lines in Nature
Take a walk, look for lines...in leaves, trees, plants, wood, branches etc. There's so much out there! Paying attention to those details and incorporating them later in your own works of art will only make you work more realistic and believable.
Hanoch Piven Portraits
Hanoch Piven is a collage artist. He using paper, paint, yarn, bolts, nails, found objects, etc and creates simple yet effective portraits of famous people. Pick someone to try and after looking at some of his work, try to channel his process with your own work.