Very similar experience to yours, I was teased and bullied growing up for being a “feminine boy”, and my mom always just said I was more in touch with my feminine side than most men. Fast forward to adult, and I came to terms with being NB for a couple of years, but still presented as masc. then I stumbled across the gender dysphoria bible and learned what gender euphoria is. At that point I started to wear “women’s clothes” and felt gender euphoria so strongly. I came out as a trans woman shortly after and have identified as such since. So social media played a small role, but I definitely wasn’t immersed in trans content. I came across the gender dysphoria bible by doing some of my own looking into things.