Well, I finally finished one of my projects. Is there a friendly place online where I can post a few pictures of it for people to see?
I have several places to offer for you to share your MOC.
Eurobricks - here we have a forum, split into several subforums based on the primary topic. Don't be afraid of "Euro" in its name - there are members from all over the world.
Flickr - photo hosting website, however there is still a strong LEGO community. You'd upload an image and add it to related LEGO groups for others to see. Having more followers makes it easier to be spotted by others.
Instagram - this doesn't need an introduction I hope. Posting your very first picture over there may not result in many likes. You need to invest time in getting followers.
Youtube - some people prefer making video of their creations rather than pictures.
Rebrickable - this website has multiple LEGO related uses. One of them allows you to share your MOC, but it needs to have a building instruction. So other people could also build your model and it is not just for show off.
Might I also recommend MOC-Pages? I haven't been active for some time, but I still check it out from time to time. Posts are more like blog posts, with editable HTML. There are also groups and contests to explore.