Can I identify as a femboy on hrt ?

I think im definitely more non binary or gender fluid. I don't necessarily feel like a woman fully. Yet I don't full fully comfortable being a guy or at least a cis typical male. Is this just imposter syndrome? I don't wanna come off being offensive to transwoman. Just this is how I currently feel in my said transition. I know I'm not cis because I do like being on E, I do take serms as well (Breast Blockers) Just in case if a few years down the road I regret having boobs.