Assalamualaikum! if you dont mind me say this, well im a female but since i was a little kid i was never into any girly thing. i dont like girl’s outfits, girl’s style and pretty much everything what a girl should be into. i have never had long hair too. i have always known as a tomboy in my big family. however, i have never hangout with boys or have a group of male friends, i always wear hijab and appropriate casual outfits(big hoodies,slacks,etc) and i never have a desire to become a trans man. i just dont like either? until now (i am reaching 20) i still dont feel any different. i cant get myself to be like the girls in my family, i dont want to be boys as well. but like i said, i cover up just fine though! people see me as a normal non-girly female on the outside. and i never leave my prayer. so im not sure if this is okay or not. my family is very religious too, they do try to help me find my way.
Human masculinity and femininity comes in a spectrum, and it does not always fit a person’s assigned gender, thus there are highly masculine women and highly feminine men. This is part of the natural variation that exists among humans and has to do with levels of estrogen, testosterone and the sensitivity of your cells to these two hormones, probably among other things. There is nothing wrong or sinful about being this way, as it comes from factors outside of your control, as long as it doesn’t cause one to do unlawful things.
As far as I know Islam does not offer any specific advice on this matter other than the usual advice of staying close to God through worship and seeking His support. You’d have to find your own way, like you said, and inshaAllah you will find success and fulfillment in this life and hereafter.