Sorry, I couldn't reply post haste, I was doing a reply.
I agree with readlliea, rolling the dice in this instance would be you letting anyone else know what you want to partake in.
For example, I have a couple of muses I brought here, and I don't like to limit my muses to a certain theme/genre. I am crossover friendly, yet I may have more than one "reality" or AU for my muses. I also NPC several muses in the world that I have created. I am the DM, and I control what I want to allow my muses to partake in.
Please do not apologize for not knowing this or that, we all start somewhere, and as creators, we should be willing to assist one another in our quest to create.
Just as an example...I have been rp'ing for over 15 years. I have a manuscript over 500 pages handwritten, yet I never delved into a fantasy/multiverse/sci-fi sl with them until I met my awesome partner on here who took me to that other level.
Any rp site should take you to the next level or expand on whatever YOU decide you want to delve into. I love this site because there are forums where you can explore and find your niche. It's not complicated, and trust me when I say that there are people who will be willing to start at the bottom and rise to the top with you.