If anyone is on the fence about starting FFRK, now would be a great time to do so. The 4 year anniversary of the game is coming up in about 2 weeks. Some amazing stuff is planned and all levels of players can participate and receive some awesome gifts and bonuses. As long as you've completed the tutorial and Book of Trials I so you can access events, you can join the anniversary event when it becomes available.
Hope to see you there. With all the new features being introduced, including improvements to auto battle, it's shaping up to be a good time.