1, you need a good GPU and CPU i well go 30 series card up (you can go to 20 card by would not recommend it) AND a lot of hard drive space 500GB+ no data caps mostly downloading like the Pony Diffusion V6 XL is 6.5GB for start
2,not all AI software can do NSFW art so my go to is stable diffusion webui
https://youtu.be/onmqbI5XPH8?si=_gqlr4FcBeRQSgHK
this video is fantastic and it gives you step by step up to get you up running
3, the models and checkpoints
now the checkpoints what I would recommend is download the Ponys models I would recommend using
https://civitai.com/ there's a lot of spanking models/lora for free
tips
you got to put the time in you cannot just go yeah good art that was easy it's experimentation all the time it like you got the ingredients for the food but you need to make the recipe to make the food and that the the fun and interesting part
I just open the door and I've just scratched the surface don't make me go into dynamic prompts and control net and add-ons