Please start a thread containing at minimum your username and then post images in that thread. Each member who wants to display his or her collection should have a unique thread.
You can use the built-in Gallery to upload images, and then link to them directly in your post. This is how I'd like to see people use this forum, so all the images can be browsed in the Gallery as well as in this this forum. There is already a Collections category in the Gallery--simply create a New Album, upload your photos and then you can link to them from your post by using the BBCode link that is displayed when you view an individual image. For instance, here is a page in the Gallery showing off a member's collection:
If you look to the right, you'll see a box titled, "Hotlinking & BBCode". Simply copy the BBCode text into a post and your image will appear directly in your post when you submit it. For the above link, the BBCode you'll want to copy is:
You may freely edit posts indefinitely in this forum, so you can update your collection as it grows.
If you have any questions, please holler!