On the main page, there is a tab that says "gallery"....third in from the left.
Click on it and it will bring up another page, then you will see another listing below the tabs on the left which says "my photos. my albums. my favorites".
Click on the "my albums" and then it will give you an option to "create new album"....when you do that, it will bring up another option to upload pictures on the right side of the page.
I find that it helps to have 2 tabs of the site up so I can flip back and forth from the files that I am browsing on my computer that I am uploading.