Personal learning curve model (UML)

Below is my learning curve:

Let me explain this figure:
The first is the initial stage (one day, that is, the Foundation), and the second is the tool used for a learning point (that is, our weapon and sword ), the third is the advanced stage (double day, I do not know the maximum number of double days :)).

Learning is a dynamic process. You can use activity graphs for modeling. But it doesn't mean that learning computer technology requires serial learning from start to end. This process can be iterative.

You can also see that this activity chart is not over. It is because there is no limit to learning. I have not found the end point of my learning.