Hello there!
I have started with AWS learning path and currently with CLF-02. I saw almost 3 Demos, but the instructor doesn’t say how we can utilise the Playground to practice the stuff. Is the course just about hearing and no hands on?
I would really appreciate, if there were some exercises after each section to practice live, rather than just listen and answer some questions in quiz.
Also, I asked some questions via feedback and no one addressed it.
Feedback may not be working well right now, so asking here will work better 
The CLF-C02 course is pretty much 100% an exam prep course, so there’s really very little support for doing practical exercises. We’re considering adding materials so you can follow along with the demos, but as of now, this has not been done yet.
I would suggest for practising the contents of this course to use AWS Cloud Quest: Cloud Practitioner