You can even try nudes but it usually doesn't do nipples unless you finetune it.
You can use this to finetune with like 4-9 pictures:
https://colab.research.google.com/drive/15vFLeepkSTr1qd4xs31g9kMEiwkWP0sh?usp=sharing
but it is really slow without paying and even with paying it is slower than RTX 3090.
Myself I rented RTX 3090 and used it through SSH and got a 256x256 picture generated in 20s and finetuned the model in 2 minutes. 300x600 pictures were generated in like 2min.