Question at course

Hello from Russian =)
I talk to you a google.translate.
Help… Bought a course https://www.udemy.com/unityrpg/
I do not understand what to begin with…
Sections 1-10 it is 1 project. Sections 12-15 it is another project, But in it there is much more interesting information.
If I begin to learn one after another, then after the 12th section it is necessary to do other project not to miss a thought?