Learning this SDK

Hello world!
This is my first post on this forum.
I am trying to learn more about how to develop with the VST 3 SDK. I am familiar with C++ so I don’t think I will have too much trouble with the programming, but I am wondering what are the best ways to learn to use this SDK/examples of usage.
Additionally, I am trying to create plugins for FLStudio or other audio editing applications for my friends and am wondering what I need to configure before I start developing.
Thank you for taking the time to read this and have a great day!

A good starting point is the VST3 Dev Portal.
There you find the technical documentation and examples and tutorials.