Glad it is working well for you! I think it works well because the AI has thousands of historical photos with this sort of "aging" to help make the effect look nice.I really like this style. It gets good results on the first or second try.
I was able to use flux on nightcafe for free to do three generations the prompts were both : "(((full body visible))) 20 yr old woman with pink dyed hair dressed as an assassin in a burning factory, intricate, highly detailed,8k ultra-realistic, colorful, painting burst, beautiful symmetrical face, a nonchalant kind look, realistic round eyes, tone mapped, intricate, elegant, highly detailed, digital painting, art station, concept art, smooth, sharp focus, illustration, dreamy magical atmosphere,4k, looking at the viewerI'm lucky enough to be able to run Flux (the latest model in the Stable Diffusion ecosystem) that can be run at home with a beefy graphic card. There is a big step in quality.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.