Nems shouldn't be in a tank that hasn't been setup for atleast a year...they aren't the easiest thing to take care of.
In terms of easy corals, I have good success with soft corals...kenya tree, mushroom leather...I have zoas, duncans, and rics...my zoas have been struggling as have my green star polyps. They are easier, but for whatever reason I have much better luck so far with my duncan, rics, and mushrooms.
Kenya trees, green stars, and some others are really easy to keep (unless you are me it seems) and can grow like weeds, easily overtaking things in your tank. This is what makes them great beginner corals.