Trans identity is also a spectrum, there are trans persons who needs transitionning, the one who don't, and all the possibilities inbetween.
A good exemple is non-binary trans person who still decide to transition.
I am not one to explain why as this is always down to how one feel in their body and mind, but in the end, follow you guts and do what makes you feel good with yourself.
You say you would't like to have a mixed look and that you would't pass. But maybe it would be a good experiment to try some makeup or clothing. Maybe shave your legs or something,
See how that make you feel, then you'll be sure about the road you want to follow ;)