How to access the taxonomy , termstore and terms and also here you can learn on how to fetch all the terms across termsets using pnp js library in SharePoint Framework project.
Here you can learn on how to use the column formatting feature to customize the column and it eases the way of calling the other columns in simple JSON format syntax.
Use the code snippets to get the current users information from the SharePoint Framework webpart with PnP JS library
Here, you can learn how to access the user licenses from the Office 365 tenant using Microsoft Graph API with an simple client side application.
This post shows you the way to use and execute the sample ( QuickStart ) angular js application to connect with Microsoft Graph API.