I don't believe there is an age limit for playing poker. It is true that if you are too young, you might not fully comprehend the importance of money and the responsibility that comes with it. Apart from that, I think perhaps younger people have an advantage because they generally have more energy and an easier time learning new things. However, I doubt that being very adult is something negative. If you genuinely have the desire, I think you can start from scratch regardless of your age. The only thing needed is to have minimal motivation or enjoy the game.
In summary, yes, I believe being young certainly has its advantages, but it's nothing decisive when it comes to playing.