I believe what you are saying; there are many trading courses that are free, and we can get ideas without spending any money. Which is not like others who have to pay for seminars and then what will be taught is only basic or verbal.
I've watched a lot of things on YouTube that I can tell if I've learned anything, and the others I'm going back and forth on because, when I analyze them, their explanations are true.
There is no harm in going for courses that are freely available over internet. Such courses may give you some useful points that can help you in trading over period of time. Trading or investment is about creating a strategy that can guide you throughout your journey and this strategy must be developed by your own mind. It's best to train your mind through different techniques i.e. by doing actual trading, watching online courses etc. The sooner your mind is trained, better it is for your future investment/trading.
One shouldn't be in a hurry to learn. Trading is not something that can be learned quickly, and one needs to give it enough time to learn everything properly and be able to grasp all the ideas and everything because knowledge is the first step when someone gets into trading. Without knowledge, a person can barely get success in this industry because trading is not like gambling where you can rely on your luck to make you win trades randomly.
Indeed, one doesn't necessarily have to buy and use paid courses because almost everything these days is available on the internet and one can access all the knowledge and information for free without having to pay anyone a penny, it's all about how much dedication one can show.