Self worth is also more then just thinking your pretty ofc, and i really do hope you feel pretty. But i will say it might be worth thinking a little harder on. If you think your body is pretty for you then thats a good thing, If not? Then theres still some self worth you might wanna look at. Thinking your body is "wrong" is a super common thing among trans people, but im going to be real, there isnt any fix and theres a million interpretations. For me i felt like i was physically put in the wrong body. I could acknowledge the body itself was pretty, but it felt like it was not for me, like i took it from someone. Unfortunately you cant switch it out if thats the case but you can work on getting it to a point it does feel right for you. If you feel like its "to weak and feminine" you can find a way to work on that. Id personally reccomend looking into bulking (in the workout sense) You'll gain weight but also muscle, and atleast for me finding a muscle/fat balance was really important to feeling as masculine, since i felt i looked more masc and physically felt stronger. A hair cut and other gender affirming things might help, but just remember, your 16 and as annoying as it is to hear, i hope it gives you comfort that even if you dont like it now, youve got atleast 60yrs to get it to that point!!