To address your second question, OP, Yea I had male traits long before medical transition. I knew when I was 4 that I was "supposed to have been born a boy" (I didn't have a word for it as a 4 year old in 1974)... Just as a lil background.
Late elementary school it really started (hmm puberty?)--I was read as androgynous ("are you a boy or a girl?" coming from kids and adults alike) or as male. I was getting screamed at for being in the women's washroom (despite my long blond hair lol; well it was the 70s so dudes / boys with long hair were not a strange thing). I started using the boys / mens because I wasnt' being hassled there. In college I was given a hard time for being on the womens' soccer team. Heh.
I wasn't hairy pre T but I was always muscular & had no trouble putting on (more) muscle.
I'd always done all the 'boy' things too: dirtbikes (still do), playing drums (still do), hunting (still do) etc LOL. Basically I'm just a taller (and now bearded) version of my wee self haha.
In fact I didn't medically transition (T and surgery) til I was in my late 30s because it really wasn't necessary; I just needed a liiiiiitle push from androgyny and being called 'sir' 80 % of the time to 100%. So, T. I'd wanted a beard since I was a kid too so that's been nice

Back to the chest issue: despite my boobs being easily concealed, they were a major (the only?) point of dysphoria and had to go. I have always preferred being shirtless too sooooo yeah