https://www.pscad.com/knowledge-base

This is the best site and support where you can start your PSCAD learning.

You can search for some sample cases or any sample cases related to the microgrids with the package. You can read the manual to clarify doubts. There are plenty of tutorials in the PSCAD knowledge base as well.

I saw the above useful answers. What I can add is that you can post your questions to PSCAD Q&A https://forum.hvdc.ca/

I suggest you install the PSCAD and study the manual. Also, you can refer to the following page;

https://www.pscad.com/knowledge-base