awww thank you...this is really touching TT i try to balance talking about my daily/personal stuff to not clog anyone's feed, so it really does make me happy to know my little life updates can have a positive impact...if it offers more reassurance, i am friends with many lovely feminine trans men like me. we are out there and existing!!

it depends on what you mean by 'working adult life'? i assume you mean professional/career wise, but you can always specify if i'm off the mark. when it comes to being a feminine trans man and the workplace, i'm not "overall" out. at my previous workplace i was fortunate enough to be in an almost entirely queer environment. even my coworkers who weren't some flavor of queer themselves had a gay child, or queer friends. so i revealed this to them once i felt comfortable they were people i could entrust with this information.
i am by default usually not 'socially' out at work, or...general walking life, unless i am comfortable disclosing it. to me it has never been a pressing matter to pass all around. i went on hormones for a little over a year so i do have some tells that usually just make some people think "...what is this weird pretty thing??" in a way you'd view a bird. not malicious but sort of confused/intrigued lol.
i think it depends by and large on where you work. if i was in a more conservative setting i would probably have girlmoded more and never brought up my gender/etc/anything. it doesn't bother me to girlmode, it feels like bugs bunny wearing dresses...yes he's giving very girl, i sure am lmao.

so i guess my advice is ymmv? to me i always know the people i love and care about will know and understand, and if i have to hide my queerness in a workplace, that would not be me being any less authentic or true to myself. i think that would be important questions to ask yourself...are you the sort of person who can handle being in a job where you may have to girlmode, or is it a non-negotiable that you want to be out in your work environment/the former would trigger dysphoria or immense discomfort? neither of these are wrong answers since everyone has their own comfort levels. and you might not know what your comfort levels are until you step into multiple workplaces. IE i could girlmode at an office where not everyone would share the same views as me but like...i wouldn't be able to work at a church.

it's very scary but i think the more comfortably you get acquainted with yourself the more the answers will come with time. there was a huge period of my life where (I DO NOT THINK THIS ANYMORE) i used to think being a feminine trans man was dooming myself to a life where cishet people and other queer people would be doomed to misjudge me. i could no longer lie to myself about very much not being a girl but historically the way i carry myself has triggered other trans people since my dysphoria doesn't present itself in the same ways. it was very melodramatic lmao "yay i'm a feminine trans man and that means i'm doomed to be misunderstood and unloved <3"
anyways that is very much not the case. i've had a nice apartment with a chill cishet roommate for 3 years, lovely friends, different hats for different jobs i like wearing, and a boyfriend who never forgets to remind me what a pretty lovely boy he thinks i am.

if you have any other questions, you can always ask me! if something is tmi i would simply say i wouldn't be comfortable answering it but considering i've talked about my previous experience with kink clubs / sex and other tmi topics i am very hard to ruffle. but i do hope it helps to know that living as a queer adult and especially a feminine trans man is not a detriment and we do have very fulfilling and rich lives outside of work and in, too. :3