Congrats for getting into Pokemon. You'll be seeing every Pokemon for the first time. In terms of which version to get, the story is the same for both. The only thing I believe is different is the version exclusive Pokemon. I believe more people have gotten X than Y as well, making Y the less popular of the choice.
Here is a website for version exclusive Pokemon: http://www.serebii.net/xy/exclusives.shtml I personally believe X has the better Pokemon.
Get X if you want the better Pokemon, get Y if you want the less popular of the two. Hope you enjoy!
Edit: I got both, but I like Yvetal more than Xerneas. Although, I will probably be putting more time into X than Y.
https://www.trueachievements.com/gamercards/SliferCynDelta.png%5B/IMG%5D">https://www.trueachievements.com/gamer/SliferCynDelta"><img src="https://www.trueachievements.com/gamercards/SliferCynDelta.png
