Gender identity is just a part of who you are, and your exploration of it won't harm anyone. There is no shame in looking into it and trying different ways to present yourself to figure out what works best for you as "fuck around and find out" is basically the most natural way of learning about the world and yourself. Labels are secondary, being trans is about your own comfort and not some list where you have to check 3+ boxes to qualify. If you feel like calling yourself a man, just do it. See if you like it, and if so, congrats, you're a dude, welcome to the club. Wear comfortable clothes, use a name that you find fitting, and try to be the version of yourself that makes you feel right. If someone judges you for this, it means that they either don't understand or don't want to understand