This TI it's not the best but you can tell who she is, better versions will come as I find the the perfect learning rate.

The trained images is from her 18+.

Use the word celebrity before the trigger

i.e.

celebrity sabrina in AUTOMATIC1111

celebrity <sabrinav1sd15> in InvokeAI

Recommended model: https://civitai.com/models/3855/epic-diffusion

Recomended CFG scale at 11 or 14 except if your sampler starting tearing the face then use something like 9 or 10 but always higher.

Don't forget to do your due prompt work.