You don't need to follow a such course, just learn from any sources both videos or articles. Online won't learn us about experiences, it is all only about theories. If we want to know the theories, there are already many sources to read. What we should know is the experience, it can be from experts or from our own trading. Experts won't offer newbies to learn them online, most of them keep their identities. So, we can expect much if the online course is trustable.
There are some online courses that can really help you get in track but they're a rare gem online as the most popular online courses are just clickbait or just a quick cash grab for the creators of those courses, you're right that it's all theories but at the same time we also need to do some applications on those theories.
Finding a legit service to learn trading is a tedious task. You can see more and more number of trading analysts around. These days most of them prefer telegram channels for this purpose. It is good to join trusted services, if not the better choice is to make use of YouTube channels where analysts brief about the regular market condition. Taking those points as the reference you can practice little by little. Surely within few months time you'll enjoy trading.