You’re young, and you live in a social media age, which is really hard. It’s a lot harder than when I was your age!
Other than learning to accept your body as is; this is the best answer by far.
You could invest in a padded push-up bra to get you close. Try a few out for a while. It could be all you need right now. Also, those sticky “chicken cutlet” cleavage add ons, forget their official name, but they could help too.
Surgery should be a very last resort/not at all.