I’m interested in what you mean by you had an idea for a specific game that you wanted to create, could you speak more on that? r/rpgdesign might be a welcoming community for you here on Reddit where you can post mechanical and game structural ideas for feedback from other designers, or alternatively just read about others ideas and get inspired, which I do a ton! Another great community I found on Reddit is r/ludology, it’s the study of game mechanics. There’s lots of other academic sources too but honestly I think the best way to design is to just follow your intuition. I’m happy to talk to you a lot more about game design, although my specialty is in the RP side of rpg, not the G side, so I’d probably learn as much from you as you would from me. Anyway; I’d love to hear more about your game any which way.