I don’t have all your answers Rune, I just want to say you are not a poser and Welcome to TGH.
Being transgender is about you knowing who you are, not what other people would label you. Otherwise many of us may not fit into anything. As for passing, I am not a big fan of judgment in that way but can offer constructive criticism if thats what your asking.
Hormones work some miracles and from what I understand FTM transition HT will lower your voice and put you into a second puberty. And from experience of my own first puberty, its different for everyone. Sexual frustration is there. Not some I would want to experience again but for you if thats what you expect and accept to happen. I’ll be here to tell you there is always another tomorrow.
I hope you decide to stay and if you send me a message with question I’ll try to answer.