this was a website my niece used - dont upload any images until you have fully read the T&C's (that applies to ALL websites)
But it was useful to go through various images
we went through quite a few and we discussed what she thought was good and why etc and of course went through her images - the competitions subjects also gave her a reason to go and take photos
public can rate images and they set competitions by subject -
Also the meta data is often included in the image so you can see the Camera, lens, Speed, Aperture, ISO used
Welcome to your new favourite photo community. Be inspired, get your work seen, and win prizes in our daily photo competitions.
www.photocrowd.com
and there are loads of sites like this on the internet, facebook has loads of groups as well