I remember my wife and mine first day. It was pretty frustrating, but we learned some valuable lessons. Cachers are creative people. Don't underestimate anything. Look in the tops of poles, under tables, under light poles bases, sprinkers, yes sprinklers, we found a mock sprinkler that looked like all the rest in area that contained a cache. Some of the easier ones are the magnetic ones, because being magnetic limits where you have to look. The more you do it the better your cache sense will become. Just remember many times your GPS may be right on, but it could be way off. If the person who placed the cache receiver was showing an error of 10 feet and your reciever may be showing an error of 10 feet, your ground zero may be about 20 feet off.
Good Luck!