"kind of" and "sort of" mean "to some extent" or "part of".
For example, you could say a sentence like "Part of me wanted to be a doctor, but then I decided to become a teacher instead". It would mean the same thing as "I kind of wanted to be a doctor, but then I decided to become a teacher."
It means that a person is torn between more than one option (part of them wanted to do ____, they wanted to be _____ to some extent".
Does this make sense? :)