Indeed it is normal for a person to experience a loss when trading, and of course we can minimize that. And I think the only way is the accumulation of experience. When we have enough experience, our mistakes will be fewer, and that leads to fewer losses as well. Learning from theories alone won't produce any results, we need to practice and direct experience.
So my advice is to start trying and don't be afraid to fail. You'll find your own strategy in trading soon.
In start it is hard to make money from crypto trading because trading is no doubt very risky and you can lose your money if you take wrong decisions. It is also a fact that crypto trading is very profitable from all other sources of income but it is also very difficult to make money. Don’t be panic about the current situation of the market. This condition will soon come to an end.