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.
Everyone needs a plan when they are in the market of cryptocurrencies, if you do not have one then you are going to find yourself on situations you could not foresee and just when you need it the most you will get something called paralysis by analysis.
This happens when people receive too much information at the same time and instead of taking a decision they keep delaying taking the decision so they can gather even more information, however if you have a plan you can take decisions in a split of a second and that is critical when it comes to the markets.
For me the best strategy takes a long time, although depending on the desire and interest of the person is what determines the time, in my case I rely on reading books, and the books I recommend are those by Jesse Livermore, Richard Wyckoff, Malkiel Burton, Warren Buffet, to get an idea of how to analyze the market from the point of view of experience of market speculators in the Stock Market whose teachings are fully applicable to the Crypto market.
For me, this is the best option, and after having read a couple of books by these authors and learning the way they saw the market, learn how the crypto market works, that is, the dependence of altcoins on BTC and to learn to use the tools that the Exchange has to choose very well, for me, that is the correct way to later learn technical analysis, with both analyzes plus the correct use of the Exchange can guarantee greater success.