Where are the tutorial files?

Thank you 

Check this out: https://community.adobe.com/t5/indesign-discussions/indesign-tutorials-hub-your-one-stop-shop-for-learning/td-p/13770877

For what in particular? 

You can look under the Help menu for InDesign tutorials.

YouTube has lots of tutorials too.

You can sign up Linked Learning (formally Lynda.com) has a 30-day free trial.