Congratulations😊
My Doctor prescribed a T blocker as part of my HRT regimen, so I don't have experience with starting HRT without it, but even with the blocker I was able to present as a guy for 5 years. And since my breast development was not that great from HRT, I was able to hide my breasts with a tight undershirt, but everyone does not have the same experience with HRT, it depends on your genetics, age, what you look like when you start treatment, etc.