PTS as a beginer

Hi. Just started the PTS course for the EJPT exam. I want to mention that I do not have a good background in networking. However, I have a background in web servers with nodejs.
My question is: Did I made a mistake with the PTS course? I completed my first lab with Wireshard, and after I spotted the differences between HTTP and HTTPS, I checked the solutions convinced that it would be identical. But in the solutions the teacher was checking so many other things before wireshark.

Will all the course contain this surprises or just the prerequisites chapter?