I'll throw something in here.
Back in March I was one of a group of people who arranged a performance by a professional dance company, but the point is that the dancers created a piece of contemporary dance based on their experiences in lockdown but since they couldn't meet in person they each worked on the theme in their own homes and shared their ideas via zoom and from that built up a compete production.
So you could decide on a theme and both of you create a very basic outline piece of art and send it to the other person and go forward from there exchanging image files and discussing via e-mail, phone or even Zoom, if that was possible, ways in which to develop and build on each other's ideas to create something between you.