Cryptos are highly volatile.
First learn the basics of Forex trading - different strategies, what types of trading you can do (scalping, day trading, investing etc). Take a look at chart reading and trend recognition. Learn how to the differenent orders work (market, limit, stop limit etc). Do some research on the exchanges that provide what you want to trade and their funding and withdrawal fees along with the minimum order amounts.
If possible - invest some time (a couple of months at least) to open a demo account somewhere and do some trading there.