I was in the same boat as you, my first fish were blue/green chromis, then I got a clownfish pair, then when my tank reached a little bit after the three month mark, I got my YWG and pistol shrimp. Just watch you parameters for the next few weeks, make sure it stays good, if they are good I would say go for it.
Also, as for the coral, my toadstool coral was my first in my tank, and he is still doing great and growing, you should defensively pick up some type of nice leather as a good starter, they will help you a good bit with seeing if anything is off in your tank as well.
Also, as for the coral, my toadstool coral was my first in my tank, and he is still doing great and growing, you should defensively pick up some type of nice leather as a good starter, they will help you a good bit with seeing if anything is off in your tank as well.