hooooo boyyyyy
I think if you are to stay on IG but you want some "cleanup" or a new look, maybe keep the line art and sketches or any black and white stuff to stories? That way, you can post multiples in a day whether they're unfinished or not. (Then you can organize them into those little thingies on your profile in case anyone wants to see the drawings again and flip through them.) I think more people check out stories and reels than actual profile pages on IG nowadays, though. What are your views on that?
imho, IG isn't the way to go--it may have been years ago, like between 2013-2016. I think you'll see greater strength in sharing your works elsewhere, like on Cara or Bluesky or uhhhh something else. But that is merely my opinion! If you already have a following/audience going on IG, then it is understandable to want to keep that and keep people interested.