All card games rely on statistics, and that goes double for poker. Statistics mean math. Numbers. Equations. While I would not recommend cracking open a dense tome left over from university, I would suggest that a familiarity with simple odds and chances enhance any player’s game.
A breeze through the internet would help. It might be too deep a topic to cover here, but “poker math” is an easily accessible subject. It relies on the odds of this or that card being drawn and played.
Those numbers and the poker odds become terrifying once you factor in all the millions of ways that cards can be shuffled, dealt, and mixed, but a Rain Man-style intellect is not required. Often, knowing only vague chances puts a player above the rest.
A little bit of knowledge allows you informed decisions. If you ever wish to see your poker game take off, then you must study first. Until then, it is mostly luck.