Ok, here's my opinion. As a beginner, there's no "one" course that will do the trick. A lot of it is about exposure; learn some by watching, learn some by doing, make mistake, re-watch video, then attempt again, get stuck, repeat. Youtube is good for answering a specific question but PLC is bit of an niche so videos are harder to come by than other topics.
The best course I found are vendor provided courses, but those goes for $thousands. I see this course is lot less than that, so just pony up and pay for it. If you are serious, take as many of these course as you can, from your link and others like Udemy. let's face it, couple hundred bucks is a bargain if that's your intended career direction.