First corals

as far as feeding, no you do not need to feed those corals. They will get their nutrients from fish waste. You probably would want to move these corals from the direct flow, as these can get little knicks and can easily get infections, same with bubble corals etc

As far as clowns hosting........my personal preference is to avoid anemone. They can cause a lot of havic in a tank and as said clowns will not always host one. If they are captive bred clowns, then they will probably not host. I had a rose bubble tip that my clowns never hosted, however they did host my sun corals, my dendros, my fuzzy mushroom and my star polyps.

zoas are an awesome coral as there are so many colors and varieties of them!
sounds like you have a great start!