Never stop drawing...I went to art school formally for a while...and thats the best advice they gave me, and I could really see improvement if I drew every day/ You're already doing this! Good for you.
Yes, the research is the same, the methods of abstraction and distillation are the same, the difference is I must communicate my ideas to carpenters, welders, painters and more..and the solo artist gets to build his stories himself! So, my communication kind of art is the main artwork we look for in #TheatreArtists...the drawings, knapkin draftings, real draftings, watercolor etc. renderings of a scene, and so on. The final live product, repeated sometimes for more than a year - is the real artwork. Ethereal and temporal, it changes slightly every night depending upon the people engaged in the performance! A production photo alone cannot capture the experience but it does say something about the composition at the moment.
Surely you've studied some art history and architectural history and furniture history? Your personal visual library is probably larger than you know! I'm always looking for good good reference books. what does your list look like?