Work through the story line at a pace that makes you comfortable. Many of the folk who are impatient in instances are trying to complete gearing up for end-game content. They're bored and frustrated that the rush to get to end-game means there's no more content for them until the next patch.

Look for a Free Company to join. Being able to chat with others in-game can make your game go more smoothly, as you'll have all levels of experience on which you can draw. Running instances with FC members can also be a lot of fun. Ask for tips, find study guides in the forums, look at videos for help in getting better at your class/job. [Also realize that videos of class/job rotations from a year ago are probably only accurate until you hit level 50, then look for newer videos].

Try out other classes and jobs in-game as well. You may find Scholar suits you perfectly, you may find you really like the playstyle of Bard or Dragoon (or Warrior, or ...) even better.

Have fun in the game.