It's not a scientific method, just a light way to reflect on your motivation before starting — only real first lessons give you a precise answer.
What if my score is low?
A low score doesn't mean "don't try" — interest often grows once you're actually in the process, especially if you start with practice rather than dry theory.
Do I need to already know something to take the quiz?
No, the quiz doesn't test knowledge — only motivation and how much the process of solving problems appeals to you.