To be stable you really need to monitor your water quality and get into dosing with a dosing pump once you have built up a demand with hard corals. Don’t do anything different do the same thing every week so if you do a 2 gallon water change every Sunday do that verbatim. I really wouldn’t go to far with that light I’d upgrade to a ai prime and once you get into hard corals a radion xr15 for sure.
@WWC has lots of easy going fast growing zoas. Im sure they could help you out. A few of my favorites are
Bloodsuckers
Campfire
Laser lemons
narvinas
Think of that as stage one
Then superstars
Aoi
Bob Marley
Stage two a little more picky
Stage 3
Hungry eyes
Tasers
Illuminati
Pixie dust
Again I’m not saying zoas are the absolute easiest coral but definitely a coral to get used to and like because they are colorful pretty fast growing and sell well. They are not the easiest to frag though but let’s save that till you need it. As far as growth
Some zoas will grow polyps weekly, some High end zoas grow a polyp a month like speckled kraks, some a polyp every few months like Jamba Juice some super high end zoas are fast growers which is good like grim reapers. The more stable and high quality the tank the faster the growth on any coral. A happy coral is a growing coral.