I find the current male clothing I find in stores is very plain and kinda boring
I'm glad I'm not the only one who thinks this!
You'd be surprised how well a lot of women's labeled clothing will fit and you can steer clear of things that are meant to accentuate a bust pretty easily actually. The biggest problem I've found is that a lot of women's tops aren't designed for masculine shoulders and arms and might be uncomfortable or fit weird.
It's difficult to give advice because what will fit and what won't depends on your body. You're also going to learn what every woman knows already - there is literally no standardization. So every different store and brand is going to fit differently. It's going to be a lot of trial and error in the beginning.