Read those books that other have mentioned already. But the strategy to use in trading that is most important are:

The use of very little amount of you your money to trader. Trading is very risky and first see it as gambling until you make money from it frequently. If you still loses see it as something dangerous.

Do not leverage or at least using low leverage. If you use leverage more than 5x for bitcoin, it is getting too high. For a better and convenient trading, use no leverage at all.

Trade with good coins like bitcoin. Some good trader will keep on losing just because of the shitcoins they are using to trade.

Discipline yourself. Do not be addicted. Do not be greedy. Overcome emotion. These are very important.