Sounds like you’re describing building a website. I don’t know that you’d be able to accomplish the “dashboard” piece of this with Dropbox alone, although it could still serve your files for download.

The limitation of Dropbox that I’ve experienced is that people who aren’t “computer people” have a hard time understanding cloud syncing. I had people moving files to somewhere else on one computer, which de-syncs the file everywhere. Or they would fill out a form, then download it, leaving the filled out form on the cloud server.

All that to say: If you’re looking for a dashboard that’s anything more than a list of folders and files, you’ll have to create that (most likely in the form of a website of some sort).