From my observation of some older traders who are consistently profitable in the market, I have observed that they usually are very consistent with their strategy or approach to the market.
Just as starting to trade on one pair first is important for a beginner trader, it is also necessary for a new trader to know that the easiest way to become confused is to try to learn different trading strategies from different traders or sources at once.
One trading strategy is enough to make you successful until it is no longer working.
What you said isn't wrong, but I often advise traders to develop their own trading strategy first. After that, they can purchase various training courses to compare with their strategy, identifying what they might be missing and what they have that others do not. You can test multiple strategies, but before doing so, you need to have a foundational strategy—your own strategy.
Trading is a very intricate field, and if you truly want to thrive and fully benefit from it, I recommend purchasing several training courses and taking the time to compare them all in order to develop your own strategy.