I can see that not having experience with TTRPGs makes it hard to create something with it. I think you should check out solo games in the physical section here on itch. There are some amazing games in there and many of them free. This could be your first step into TTRPGs to see how this works. Most of them are beginner friendly and guide you through play. It's a great way to gain some experience.
Thanks for your kind words about RISE!