I forced myself to 'man up', I needed to 'man up' just to ensure survival and to feel like one of them, I passed all male 'rites of passages' that was presented to me as a teen, but I realize that 'being a man' thing is superficial, it's not really what being a man is about. Which is weird, because I never really felt like a 'man', I was acting, and I learnt so much. I think that you can be a man's man on the outside, and be a female on the inside. I think men and women are a lot closer to each other than most think, it's just that society wants to exaggerate the difference.
Think about it this way, you had no choice but to 'man up' and be a 'man's man' as you say. That doesn't mean it always has to be that way, it's not a standard with which you should measure the rest of your life with. three months ago, when you finally decided to be who you are, you decided to start transitioning. 20 years as a male, just three months as your true self, it must feel strange at first, give it time.
Gender dysphoria makes you focus on the things that you don't like about your body, rather than the things you do like. On some days, I feel good about my eyes or fingers or other things I really like about myself, and on other days, I feel bad about my height or my body hair. I think it's natural to have 'off' days. Cis people have to deal with too, but not as bad as trans people maybe? I don't know. There's a voice in my head that sometimes tells me this is all just make believe, and I should just focus on being a normal cis male, 'look at yourself in the mirror, do you really see something other than a male?', i've tried to purge myself two or three times, but my dysphoria won't go away.