The Dropbox API and documentation are designed with programmers in mind, so if you don't have any programming experience, it may not be very approachable. You may be better suited by looking for a pre-made plugin for your platform. I can't recommend or endorse any in particular though.
If you are interested in working with the Dropbox API though, this getting started guide may be a good place to start:
https://www.dropbox.com/developers/reference/getting-started
