I think I am a b body type, but I have a belly that needs to be hidden. If you also have this problem, how do you handle the fitted clothing that's recommended?

I have the very same problem. I carry my weight in front, and look like I'm pregnant. If I buy blouses that have the princess seams, I have to go at least 2 sizes larger just so I can close it. I tend to stick to loose fitting tops, but have some that hug my body. If V-necks look good on you, try them. You have to experiment to see what looks good on you. It helps to have someone with you that can go back forth and get you different clothes so you don't have to leave the fitting room.