In my early days of cryptocurrency trading, I read various articles and online tutorials to gain as much information as possible.
These are some of the first things I learned that I still follow:

• Understand the overall concept of cryptocurrencies you want to invest in
• Start small and scale gradually
• Diversify your investments
• Analyse market movements and draw lessons from them
• Reallocate your investment

Following these few simple principles will increase your chances of success in trading and reduce the risk of total losses.
Just remember, success rarely happens overnight. Just because you didn't succeed in the beginning does not mean you should quit on your effort.