Actually trading requires more time if you think that by just get knowledge you will be successful then i think its not a good option you should have to give a good time to your trading. There are numerous courses some beginners learn very well by gaining knowledge from these courses one of such a beginner course is udemy.com. there are certain more courses but they need more payment to get involved.
Trading is not only about selling and buying coins but also about how to analyze and make the right decisions,
actually there is much more to learn which is why trading is so complex,
if you don't want a paid course maybe you can learn from youtube, this forum or any platform that is useful