FTM How does testosterone change you?

It would be helpful if you give as much detail as possible from your personal experiences. I have not taken any hormone medication or had any surgeries, and I have done everything I can to make myself look like a man and it doesn’t seem to be working (ex: cut my hair, wear more “masculine” clothing, wear a binder, etc.). However, I have heard a lot of things about how testosterone affects your body and I don’t know what is true and what is not. I’m scared it will change me as a person, I know it changes your body, I don’t care about that, I want that to happen. But if it makes you think differently or change your emotions I think I would be petrified to try and start my transition. Thank you for anyone who reads this!!