I trained this model using Kohya SS running locally on my PC, I used 20 high resolution images of model Nicola Cavanis.

I recommend JuggernautXL https://civarchive.com/models/133005?modelVersionId=240840 but it works fine on any of the most common SDXL models, even the less realistic, more stylized ones.

20-30 steps are reccomended, no particular negative prompt is needed, use it at 0.75-1.00 strength