Small boobs backless dress...

Hello everyone, I’ve recently purchased a dress online for my year 10 formal (yes I’m an Aussie) I’ll insert a photo but it’s basically all backless and at the front it cuts down quite a bit. I have a cup boobs and I really need some help. What’s my best option to go for with this dress bra wise, I want to rock my dress and feel comftorbale with my chest size and I would love some boobs to go with it xx (also I’m definetly going to wear it higher at the front I’ve tried it at home and seen other people wear it higher )