If you are just starting with ThingWorx, we recommend that you start with the content on the developer portal.
Set up an account here: https://developer.thingworx.com
The dev portal will host the Foundation Trial Edition server for you in AWS to use for 30 days. Or, if you prefer, you can download the trial edition to use locally. The trial edition is a fully featured version of ThingWorx that is constrained for evaluation use. It will allow you to develop in the environment for 120 days.
If you are new, I recommend starting with the ThingWorx Foundation Quickstart.
-- Michael Aglietti
VP, ThingWorx Developer Program