I think it’s worth pointing out that I don’t consider myself to be very dexterous, so I’d be able to produce a useful image by trying to use AI a lot more reliably and faster than by trying to use a pencil. However, I haven’t tried to use AI to do that, and I generally don’t find AI tools very useful.
It might also be relevant that I also don’t consider myself to be very creative.
I suspect the functionality you’re interested in is supplied from https://ourworldoftext.com/home/ and/or https://ourworldofpixels.com/ so I don’t think that putting effort into replicating that is the most important thing to work on.