PTC has prepared an introductory course for Creo Simulation Live to help you get started. This course will include easy to follow step-by-step videos for each of the functional areas of Creo Simulation Live - Structural, Thermal and Modal. At the end of the course, you should be able to apply these steps to your own models.
Here is the link to the course - Getting Started with Creo Simulation Live
Please bookmark the course so you can easily access it in the future.