The gallery is for all users and I feel that it is better than using other sites to link pictures! It just takes a little getting used to when you are first trying to figure it out.
The first thing is you have to create your gallery, then you can start uploading pics from your computer into your gallery.
Go to the top of the page to "Galleries" and click on "Manage/Create",
From there you can make your gallery, then you will see the option to upload pictures. Once you have pictures in your gallery you can then copy the forum code for a picture and add it directly to your posts.