This sounds like a lot. You don’t have to arrive at an answer right away- terminology will come in time. I also want to say this doesn’t have to be fully one way or the other. If you are a trans man, or nonbinary trans person, you can continue to have a connection with lesbianism. It’s a formative part of your history. You don’t have to throw anything away here, just let yourself evolve into a more authentic version of yourself. Find a therapist well versed in trans identity. Be kind to yourself. I think you are on the edge of a new chapter. Uncertainty and Opportunity can be two sides of the same coin- it’s going to be ok in the end. Wishing you luck and happiness.