I too fantasized about being with a trans woman. I hooked up with one and I loved it. Later I figured out I’m trans myself. I still fantasize about being with trans women, but now it’s gayer. I would say don’t worry about it too much. Just treat trans women like any other woman, like an autonomous person with their own wants, needs, desires, and traumas (just maybe some more traumas than average). As with any other relationship, when in doubt, ask.