" I am interested in tips for equipping a galley and not dying of anxiety about what we just did. "
Buy life insurance and a good comfortable PFD, then the rest is all little stuff.
Although, personally I'd say any money spent on good foul weather gear and boat shoes will be among the best buys you've ever made. If you can stay warm and dry--you'll be a happy boater.
How much galley do you have on a 28'er? Typically, one burner and no oven, so it helps if you can think of "meal in one" and for longer trips, cook things at home, deep freeze them, and use the food as ice in the ice box until you take it out to eat.
Before you bring anything aboard, ask yourself, is this going to pack/stow/clean well? Can it perform more than one job? How easy is it to break when you drop it?
Take your time, make your selections slowly, and browse older threads on the different sailing forums. You'll find there's a lot about galleys and cooking under way, including sections on the magazine web sites.