My partner came out as trans (I'm ftm myself)

Hey everyone. I'm ftm and feel like I've gone through most of my transition at this point except for bottom surgery. I met my partner somewhat recently and really enjoyed being this cutesy gay couple. When we first met they said they preferred they/them (altho now it's she/they) and was nonbinary but masc-leanimg in identity so I didn't think much of it.

She seemed like a very masculine type of person ( what some may call a "gymbro type" ) altho she's a total softie when you actually get to know her. Well, recently she came out to me and said she wanted to transition, take Estrogen, and maybe if possible get bottom surgery. It's all been super overwhelming cause now everything is different. Even tho she was a softie it was still a huge surprise that a "gymbro" type of person suddenly did a total 180.

I'd reflected a lot on how I feel and one of the things I'm scared of is • That our dynamic will change, aka. that I'll be expected to be a dominant top and a manly man when I really just wanna be a submissive femboy bottom. • that I'll loose attraction once she starts Estrogen since I'm not attracted to womanly curves (altho to be fair I'm demisexual) • that her attraction will change once she starts Estrogen and or that she won't be attracted to me anymore • That she won't be able to top me once she starts Estrogen • If/when she gets bottom surgery that I'll really miss being topped. Plus I don't know how I feel about vaginas (this last point I'm especially scared of)

However on the positive side, I am excited for her to grow boobs and her thighs to get thicker possibly :3 I could definitely imagine us being all soft and cute and hold hands. I think we'd end up looking like the gayest straight couple or give off lesbian energy almost, but I don't mind that tbh.

I guess my question is how do you navigate all this? Will Estrogen actually make her unable to top even if she wants to? And how do I cope with her getting bottom surgery if she decides to do that. Cause that's probably the hardest part for me cause I generally prefer penis regardless of gender.

Edit: just wanna add that I'm not too much into strap-ons and toys because for me i really enjoy the skin-to-skin intimacy of it all so i don't think a strap-on would do it for me :(