You don't need to be an expert to just play poker. You need to be an expert in this field if you want to make a living playing poker and be one of the 5% of players who play in the plus. Poker is the same field of activity as any sport or any job. There are no miracles here, if a person wants to win more than lose, then he needs to work hard, read a lot of different information, analyze his game and much more. You can learn to play poker, but even to win at low limits, you need to spend a lot of time and put in a lot of effort. You need to understand what dispersion is and how to deal with it. But if we are talking about just playing for fun, then in this case all this knowledge is not needed, you can just play and enjoy regardless of whether you win or lose.