Paying money to learn how to trade and losing money when you start trading is a double loss although you have gained some idea on how to go about your trades but this wouldn't guarantee Profit. Just like you said as a beginner trader you can actually learn about how to trade from different sources like YouTube and PDF materials on how to trade. Relying on YouTube videos isn't enough and I wouldn't recommend you to take every financial advice they give you on that platform, instead learn the basics online and look for a mentor to teach you trading strategies, The only down side to this Is the fact that everyone taking mentorship classes would definitely ask you to pay.
Finding a good tutor that did it for free would be ideal, but how many traders can find someone like that? Very few I guess, so traders have no other option but to try to learn on their own, something that is not that rare, as the majority of the traders out there learned how to trade by reading articles and books about it, however I agree that it is a bad idea to pay to learn how to trade, since the majority of the courses that you can find out there will not really help you to become profitable.