It's a great feeling when the tank is finally stocked... but do proceed cautiously as any more additions (be it fish, inverts or corals) will be treated as excess burden to the biotope. I would to hold on to your existing bioload for the time being, with the exception of adding something RED for CNY
It's not normal for large quantity of Zoanthid polyps not opening up... 2 possible reasons IMO:
1) Your clownies are disturbing them by brushing their bodies against the polyps.
2) You are experiencing Nudis attack!!! Which is pretty common for your kinda zoas. My advice is, to look for hairy little beige/white creatures among the polyps... usually you will be able to spot 1 or 2 stuck onto the glass panel in the early hours. It's good for you to check it through before introducing more Zoas into your tank.
All the best bro!