As others have said, even if you know the basics, watching the Basics you’ll find there’s so much basics you didn’t know or you had forgotten already. Linking up:
https://cgcookie.com/courses/blender-basics-an-introduction-to-blender-3d-4-5-lts
Next is the Fundamentals to start getting some core knowledge in:
https://cgcookie.com/p/core
After that is watching individual courses where you start to put into good use everything learned.