At some point you will want to attune your Homestone. Basically attuning your Homestone changes the location to where your Homestone ports you. The first real Hub outside of the beginner area is Sand City. Sand City has all of the ammenities, such as class trainers, Chest keepers, Guild creation, Mount vendors, etc.. So it is a perfect location to set your Home stone to once you come to this point.
To attune your Homestone click on the big green crystal and you will be given a screen option to change your Homestones location to this point.
If you have somehow lost your Homestone during your travels you can pick up a new one here as well.