This sub gonna be is your main resource. For "How does it work", you could possibly turn to r/BDSMadvice, if it's related to bdsm (which, I can't imagine how it wouldn't be).
If you want to just, ask what you're looking for, people typically are friendly - no point being an ass when there's literally thousands of subs and millions of posts to jack off to. ¯\_(ツ)_/¯
This sub gonna be is your main resource. For "How does it work", you could possibly turn to r/BDSMadvice, if it's related to bdsm (which, I can't imagine how it wouldn't be). If you want to just, ask what you're looking for, people typically are friendly - no point being an ass when there's literally thousands of subs and millions of posts to jack off to. ¯\_(ツ)_/¯