The PCG tool is vast, and can be quite cumbersome to get your head around. Follow me in this tutorial guide on Understanding the PCG tools and how you can use them. In this tutorial you will go beyond copying what you are seeing in a forest tutorial and learn how to make the most of the PCG tools in Unreal Engine 5.
https://dev.epicgames.com/community/learning/tutorials/pLn0/unreal-engine-understanding-procedural-content-generation-pcg