Investopedia has some really good tutorials for these basic trading concepts, though they're really intended for stock traders, it more or less stays the same with crypto trading.
Have a look at this page, it also has a pretty good video on it for better understanding of the concepts explained.
https://www.investopedia.com/articles/technical/061801.asp - Support And Resistance Basics by Casey Murphy
Investopedia is your go-to resource for learning about trading in my opinion.