Hi elsawide,

Is there some kind of dummy guide that might help?

Not specifically, but all our API is, is a fairly standard JSON web service. So any REST or JSON guides you can find would be generally applicable.

Do I need to download a library for it to work or how does it work?

Again no, not necessarily, but there are a number of libraries that users have contributed that can greatly speed building your project. The list of available libraries languages and libraries is here.