I'll give you a hint. You should pivot to a collaborative design app. There are a couple around, but very few that have that "doodle feeling". You should be able to pick up a pen, sketch something quickly and then have someone else be able to modify/review it.
I'll give you another hint. Add shape recognition and move from capturing and storing pen strokes and generating bitmaps to capturing pen strokes and generating shapes. Add rudimentary grouping and ungrouping functionality, ability to move, stretch, rotate, etc. Allow pasting clip art and letting it grow/shrink/rotate when grouped with other objects, but just with a rough scaling, etc -- it doesn't have to look pretty. It's just for sketching things out.
Practically every software/design team needs an application like this and there will be money to pay for it.
P.S. I was on a team that built this as a windows application about 20 years ago, but we were ahead of our time. A SaaS webapp would be the bomb here.
