Hello. I'm Tom.

This is my first real post on here and I'm really excited to learn, receive advise and criticism and one day, help others. I have so many questions and I have decided, I'll start here.
So: I've been using Ace bandages to bind my chest for the past little while. But, as I'm sure all of you know, it's becoming inconvenient and uncomfortable for various reasons such as it slides, it's hard on your back and lungs, etc. So I've decided to look into buying a real binder and I hear Underworks is really good. But I'd still like to get some advice before I take any steps. I was looking into the Style 997 Binder Tank. I'm really really petite so I'm worried about what size I should get and if that's really the style for me. So I'll give you guys some info on me and we'll see where that takes us:
My cup size is usually a B. however if it's a strapless bra, I have to move down to an A. I usually but a 32B but on the off-chance, I'll get a 34B. Most of the shirts I have to buy are like a small for female but if it's mens shirts, I try to get an extra small. If it's a good brand, I fit a size small in mens alright.
I'm not really sure how much more info you need other than I have a really small figure and I'm only like 5'1". I'm super open-minded so I'm all yours...