I'm transmasc, but I came out as enby at my previous job (a call center). This involved a new name and they/them pronouns. I felt safe doing it after conversations with the department head about trans stuff. I'd definitely try to get a vibe on the general company culture towards trans people before coming out. I'd also definitely try to get a pulse on how supportive your boss will be if there are any issues, especially if you're in a customer facing role.
Pros: all of my coworkers were chill with it, or if they had problems with it they kept it outside of work. I did have to spend a while correcting people on my name/pronouns, but that just comes with the territory. I think it took about two weeks to a month for the name/pronouns situation to settle.
Cons: The job I worked was the type where we had "frequent flyer" customers we'd support. No one was directly transphobic to my face. But a few of these customers would ask to speak to Deadname instead of my actual name... months after the switch. They never did this to my face. They always somehow managed to remember my name when talking to me. But when they got any of my coworkers on the line, they magically only remembered my deadname. The co-workers on my team were fantastic about forcing the customers to actually use my name. I talked to my boss about this, but unfortunately there really wasn't much we could do besides correcting them. The last incident of this was about six months after the name change. Not a problem I have anymore because I got laid off in the tech layoffs lmao.
I don't ID as trans. Sorry if I gave the wrong impression! I don't know of a single LGBT person within our company. I also cannot change my name because the government of the country of which citizenship I hold doesn't allow it for this case (neither does the country's I live in afaik) and my job doesn't allow preferred names. :/