do you know any site about photography?

You should definitely check out both deviantart.com and flickr.com. With both of those websites you submit your photos and then other users can leave comments, constructive criticism, praise, advice, etc. And if other users really like your work, they can add it to their collection of favorites. Also, with both of those sites, if someone wants to buy one of your photos, they can and you earn a profit! Flickr is mostly for photography, while deviantart is for all types of art (however, most art posted on the website is photography). They both have their pros and cons, but out of the two of them I prefer deviantart. However, I would definitely recommend joining both because then you'll reach two separate audiences!