The benefit of Stable diffusion is that you have full control, but are also somewhat limited by the models you use and how well they are trained, unless you train your own, then you can do whatever you want. Also, it can be fairly slow unless you have a good GPU, but it is obviously free and runs locally. 

If you follow this one you can install stable diffusion, it has a pretty good step-by-step guide.

https://stable-diffusion-art.com/install-windows/

After you have installed it, you can go here to get models and what other stuff you need:

https://civitai.com/

Alternatively, you can use Prompthunt which I think is very good. And probably have the most user-friendly interface.

But I did a test on it:

And it doesn't seem to have any issues with it, as long as you add the NSFW tag. And it has a pretty good price as well, which is 9.99$ per month and then you get 500 images per day. They have a cheaper solution as well where you get 50 images I think. but given how many test renders you end up making then I would say that is way too little. The benefit with Prompthunt is also that their model is far larger than those you will find on stable diffusion, so you can get good results with pretty much anything. But again, if they don't have the specific style you are looking for, then you are obviously screwed, but haven't run into that problem myself.