What is the best strategy to prepare oneself before entering the trading market?
Read the basics > Read how to profits > Read the risk
Focus on the risks as that will be your challenge and problem when you enter trading. You won't understand it right away because you need to actually experienced it. Not discouraging you but in newbies days of a trader, mostly lose their money. Without it, they will never learn. That's what you need to take care of. Other lessons can be learned while doing trades regularly.