Base on your tank size I will recomend you to do water change at least once a week.
For small tank water change will be easier,faster and cost effective.
Good to have biopellet, rowa and skimmer.
Try to maintain your NO3 low. No need to be zero. 5 should be ok
Not higher then that.
Try to keep some cleaner crew like snail, urchin.
Happy Reefing
There are many out there in the market. Depending on what you looking for. Full spectrum, cree or china led, expandable, onr remote control all, programmable, tie to your wave maker? And important is affordable.