Premise seems good , I think you can use image enhancer like seedream 4.5AI etc. and you need to work on outlines, well looks like you’re just getting started so it’ll happen with time.
Yes, this is the first time I’ve done something like this, so it’s been a learning experience! I’m using Blender for most backgrounds, Chara Studio for character models, Gemini for facial features, Stable Diffusion for some body shots, and a lot of Photoshop for compositing and everything else. I’ll take a look into Seedream like you suggested, Luffy98765_123 :)