What an amazing question. Simple, yet unanswerable.
There have been about 1900 chess grandmasters in the world, out of 800+ million chess players. Chess is a game that can be mastered as it is a stable game with no randomness (with the exception of the competition). This is an extremely small % of players. The poker equivalent might be the Poker Hall of Fame which has 58 people in it and has been in existence for less than 50 years, as opposed to 180 yrs for the chess grandmaster title. But this is really not a fair comparison as the PHOF is a US only thing and may have a bit of a different function than the committee that defines who qualifies as a grandmaster.
Poker is not stable (it is changing constantly) and it has randomness (the 52 cards) at its core. We can understand poker and we can become proficient at poker until we move up in stakes and then we have to do it again. There are a few masters - we all know their names, but notice how the names change over time. This speaks to the lack of stability and constant change. If it were stable, I suspect there wouldn't so much rollover in the names at the top, though new names would certainly appear.
Some names do continue to appear through the decades. These are the poker grandmasters. The common man will never become this person. These people have special traits and characteristics and a unique drive that allow them to become who they are. You must decide why you play. To have fun? To become good enough to win? To become the best in the world? These are all much different levels of commitment.
Good luck in your journey. Have fun!