What is the best strategy to prepare oneself before entering the trading market?
You don't need strategy, all you need is enough funds to sustain on trading in order to manage your asset sustainably. Skills should be developed in order for us to cope up with different challenges, but that's normal for first timers to panic and worst is they lost a huge amount of money. Seek guidance from friends and peers who could mentor you for a good advice which eventually teach you different ways to deal with trading successfully.
Even small funds will do so you can prevent a huge amount of loss when things don't end up as you've planned. Trading is risky so it will need also a very positive mindset that will help you to get up through and through especially that if you're a newbie in trading, you will mostly lose in your first trading experience. Your skills and strategies in trading will just develop along with your various experiences. Just keep your faith in yourself because you won't need to trust others but only yourself.