Many of the traders didn't really learn from a mentor but keep trying to learn to trade by learning charts and indicators. There are pages on the internet about it, specially in the forex websites and forums. Tradingview I guess will always be a good platform to learn the charts since available without the need of installation.
I believe that by now you know you might know about cryptocurrency and most of the things about it, it’s already something you can learn online, except for trading which is quite difficult for some people to comprehend. So, if you’re one of those you can then look for a professional to teach you with practical. I once did that when I was trading forex, I paid someone and he helped me learn everything I need to know about forex trading.