alot of people will start of with damsels they are the goldfish of saltwater imo
they are compatible with clowns ime some say they fight a little at first ,tangs, royal grammas, and blennies but i wouldnt get a tang as a first fish not the easiest to keep fish as for the live food why did you say live near ocean? you wouldnt want to get live food from a ocean that could introduce all kinds of diseases into your tank most people buy brine shrimp eggs ofline and start a small brine tank to feed live food but most people skip the live food all in general. i just recently started doing it alot. most people just feed flake foods. how big of a tank are you planning i wouldnt go below a 30 gal
small tanks in saltwater are a everyday job of keeping check.