Welcome to Eorzea!

Trying to find a friendly, helpful Linkshell early on would be my bit of advice. It can make a huge difference in how much you enjoy the game.

Meeting people in-game can be difficult -- like walking into a party late and people are already socializing in their own groups... But try talking publicly using /say, greet people, and try to keep your chin up even if people seem to be ignoring you at first.