I think Karen is right, there's no specific regime. You could try PM/FG or similar, as they all help feminize your body.
You'd be surprised how few people notice breast and just presume man boobs, so you'd probably get away with A cup or a bit more. At which point you could stop the NBE.
The only other suggestion is to exercise just your butt/waist, there's loads of videos on YouTube all about feminising your butt/waist etc