Why m app inventor screen is not showing "My blocks"

Hello everybody,  I am new to App Inventor, I installed the software, however I do not get "my blocks" in the design tool bar?

Can anybody please explain to me why and how do I enable this feature.

You are new.   Have you done these introductory tutorials here:  

• Beginner Tutorials: For those new to App Inventor!

use

 App Inventor 2 

instead of App Inventor Classic

Beginner Tutorials: For those new to App Inventor!

More Tutorials: For those ready to learn more about specific functionality