There are so many sidequests that actually expand on lore and tell you their story as you move on. You shouldn't just mindlessly follow the msq and ignore your surroundings. Did you unlock your challenge log yet? Catch some of FATES that are nearby, look for an FC to run your daily roulettes.
Even if you enjoy the story and burn through it, the end is soon. Sooner as you think. Once you reach that goal, you'll be upset for not having more.. cause well the story is good y'know.