I would stay away from "easy and fast growing" beginner corals that a lot of people in the hobby sell very cheaply or give away for free, there's a reason for that. You do all the work setting the tank up, create a scape that you really like and 6-12 moths later you have it covered in GSP and no-name-no-color palys or other junk. Again, it comes down to patience. Spend more time researching the corals and other live stock that you plan on adding to your tank over time. Look for pictures of the tanks where people have the same corals, see what full size grown colonies look like, their growth patterns, etc. Just my .02