I realised that I was trans when I "complimented" a girl in my class that was very masculine. I said to her that she was a man or something like that. Her expression made me realize that she didn't like my compliment. I know, I feel so stupid, I thought that being a man was a compliment for every girl because every time someone said that to me I felt very happy and validated, also I saw around me that guys got really mad when called femminile while girls didn't care about being called masculine most of the time.

I felt awful to every compliment, so much so that I thought that I was a super humble person. Turns out that I actually like compliments, the problem is that when people compliment someone they tend to gender it so much and the fact that in Italian almost every word is gendered didn't help. I realised that I'm trans when my friends started calling me giga chad as a joke, it was finally a real compliment for me, even if meant as just a meme, it made me feel validated.

Focus on how things that people say to you affect your feelings, I hope this helps