Yes, Wikipedia is a good source of information, but sometimes you need a teacher to learn something, and YouTube has plenty of them. You just need to choose what suits you personally.


First of, it's never too late, because there is no such thing as fixed lifespan. For some people life only begins in their 60s, while for others it ends in their 20s. And if you are saying that trial-and-error approach is good for investing, I beg to differ with you. There are many fields where this approach works good, but investing is not one of them. You are very likely to lose most of your money before you learn something this way. So, by "it's never too late" in the beginning of my post, I meant it's never too late to start studying, because this is what can really make your life better, and not only psychologically, but money-wise too.