BBL

I’ve always been super insecure about my flat butt and curve-less body. I’m 24, 5’4 and 142 lbs. I also have a baby so everything looks 10x worse, my butt is flat and lifeless literally no curve at all. This insecurity has ruined my love life and dragged down my confidence and I’m ready to do have a BBL. How much weight would I need to gain in order for my butt to go from super flat to super big? What is the weight of someone 5’4 that would make a perfect candidate for a BBL? Thank you