What helped me was making a list of all the things I experienced and felt that led me to believe I am otherkin. I was actually wrong about my kintype at first, and I eventually figured that out because there were things on that list that just didn't seem to fit with what I believed at the time. In your case, you seem to know (or at least have a very strong suspicion) that you are otherkin, so perhaps you could try to write out the reasons why you feel connected to each kintype you think might apply, and then the reasons you think they're not right (even if the reasons you think they're not quite right are that they just don't feel like they fit 100%). And then once you have that written down, you can start to explore related kintypes that you feel similar connections to. It can be a hard process, and it can be frustrating to get it "wrong," but if you're able to look at the reasons you felt a connection in the first place, you'll be in a better position to eventually find a kintype that does completely fit. (Then again, I'm the kind of person who communicates better through writing than through speech or even my own thoughts. If you're like that too, then this will be more helpful, but it might be worth trying out regardless. Only you know what'll help you or be more of a hindrance, but I hope it at least gives you more ideas.)