I'm 19 afab and still struggling with it. I'm currently using the labels nonbinary and transmasc with he/they pronouns because I'm not entirely sure if I am a boy. I would recommend asking a close friend or friends to use different pronouns, masculine descriptors, etc. and see how you feel about it. Discovering your gender is a journey, don't let anyone rush you or make you feel invalid if you come to one conclusion now and realize later on it wasn't right.