Hi…,
Welcome.
I suggest you look at FAQ - Introduction to Navigraph Charts.
There are some excellent videos at
2. Navigraph Charts - Product Demonstration
6. Import & Export your Flight Simulator Flight Plan with Navigraph Charts Tutorial
7. Flight Simulation SID & STAR Visualization Tutorial with Navigraph Charts
16. Export Flight Plans from Navigraph Charts to Microsoft Flight Simulator 2020
Try creating a longer route which will allow SID-Enroute-STAR such as CYYZ - CYMX and select Auto generate as an example. Try selecting a suitable SID and STAR.
Best then to experiment and if unclear ask questions here. We are happy to help.
Cheers
Ian