Looking to upgrade my smile but affordably. Not sure how cosmetic bonding works. Any advice please?

Hello beauties,

I’m in need of getting my teeth whitened(I am most definitely getting my teeth cleaned prior to this lol) and also teeth bonding because I think I need it.

My dentist told me that whitening will not work on certain teeth of mine. But that I was free to try at home. I’d rather not chance that. So this is the route I am looking to go. I live in the NYC area so I feel I am mean need to venture out but does anyone have an advice or tips for this? I really need this lol.