Thank you
.
I'll give you the quick highlights - obviously, you've figured out how to "Favorite" a picture, then it shows up on your page.
If you find an artist who you generally like, you can click the "Watch" button on the top right of their main page, and you will see whenever they publish something new on your "Messages" page.
You can join "Groups" that fit your interests, and whenever anything new is published in that group (which for groups of any size is frequently), you will see them on your Messages page. If you don't care for the item you just delete it from your Messages page.
You can see what Groups people belong to on their main page. It seems you are a Mass Effect fan, so feel free to check out the Groups I belong to (which is many of the ME Groups, since I submit my pieces to them).
I think that covers the basics, enjoy!
Oh, note, there's no way to get DA to email you when you have new messages, so you just have to come back and check.