Everyone has a different learning style and studying for the kali lunix is difficult because there is so much that you need to be exposed to if you want to do well. When, I enrolled to educba site for the course at the starting it was a bit difficult for me to understand but the videos made it easy for me.
The helpful part was the explanations after the question which also became a learning tool. I have written this review to tell that everything can be made easy by learning it the right way.