How does the T make you feel?
I live far to the she side but am still nonbinary. Sometimes I live as an androgyne, sometimes I live as a woman. As a man, well, it sure screws with the stereotypes if I do or am percieved as doing that.
T is heavy emotionally, but being nonbinary does not necessarily mean you don't need it.
I take full transition estrogen, and its a high level dose. No T blockers, but I don't need them either.
The gender therapist thing is also good advice.
But as to the binary nonbinary thing, a lot of us go low dose, you could back it off, make a lot of different adjustments, make sure the endo is in on it though.
You may find low dose is the key to feeling good.
When I am called she, I usually feel amusement, because I am a sh'e, not a she. I do not follow the standard transsexual narrative, much to many peoples total confusion. That does not invalidate my femininity nor my ability to pass. It just reflects my core, and my core is nonbinary sh'e.
I don't expect anyone to understand this, but it is my truth.
You can do and be anything. Hormones get us to endpoints, yes. They also make us feel good. We can present any way we want.
In the end, its about how it makes you feel, and what you need to see in the mirror to feel happy, and how you socially relate to others, and how much dysphoria is driving you.
Its up to you, your choice. And you may very well be nonbinary. There are ftm nonbinaries and mtf nonbinaries and everything under the sun in between and in combination.
What makes you feel good? Live it

Satin Joy