Use this set up I use below.
Model: Animagine XL
Spell: Ufotable XL
Turn on Hires.fix
Upscale: 2
Hires Steps: 20
Denoising Strength: 0.41
Canvas Size: Extended Portrait
Here's an interesting A.I art generator to try and one I use for OCs try out this site called Yadayo. It gives you a lot of stuff to work with and on my profile I made a lot of DXD and FGO characters in tactical military gear, one model I use a lot is called "Vanilla".
https://yodayo.com/