You can search by using google and you will find a lot of article/blog which can help you to learn technical analyst to trade. But don't be strange if you get many articles about trading forex because it is the same when you trade in crypto currency, I mean you can learn the strategy and you can apply it in crypto trading.
There have been a lot of articles, blogs, reviews on a certain way to create a technical analysis, I've read some of it and it is quite useful, however, in times like this where the uncertainty is certain technical analysis will give you less than you expected, in short I don't think technical analysis is a enough to go engage with the market according to what you have read or watched. Cryptocurrency in general is volatile, most are decentralized and I don't think patterns works these days, I'm not so sure about technical analysis really, it might lead you to such a great losses.
Also, you can learn it from the youtube channel, I get used to using some youtube channel to compare my analyst and other people analyst. It can help you to make a decision or make you confident about your trading strategy or your technical analyst. There is no obstacle for you to start trading and learning it until you find what you want as long as you keep try and try although you find a lose for the first time you trade.
And then here it goes, the widely known source of trading knowledge, youtube. I must admit, I've watch some videos on youtube on how to gain/profit but I must confess, it's not always working. So it is really better to do things on your own. Research is the key!