Any tips??

My boyfriends birthday is July 2nd. I have been looking everywhere and no one will make a boob cake so I have to make it by myself! I have never done this. I just ordered the baking pans and skin color fondant. I plan on making a rectangular cake and frosting it regularly and then putting the boobs on top. The boobs will have fondant so they look cute but does anyone have tips or cheats on how to ice a cake? Any products that make it easy ? Any & All advice would be greatly appreciated. Also... should I use like box cake or is there a recipe anyone has for the boobs?

I really have no clue what I’m doing but Im really good at following directions!

This is kinda what I’m going for but the top is going to be straight up boob and nipples lol

He Loves Boobs and I know it will be just hysterical. I will probably have a Walmart cheappy just in case it turns out terrible or nasty!