its not that hard basically you look aroud the markets and see if some cryptocurrency are like -30%. Then you check them what they are use for and will they go up soon or you can just look what people do and you can follow them. cryptocurrency are unstable ,they can go up and down is 10 seconds but you can try buying and selling them at the right time (dont worry if you lose cuz this is crypto world :) ) good luck with the trading !