Umm...finding galaxies is similar to looking for anything up in the sky. The only thing is, dark skies really help when galaxy hunting. My advice is to use forget about galaxies for now. Concentrate on learning the sky for now. Find stars, find constellations, find planets, find clusters. It may SOUND boring, but you will have fun doing so. And this really helps to learn the sky, which in turn will help you finding other stuff up there, including nebulae and galaxies.
Just remember you won't see bright colours and spirals that will fill your eye piece. They will look like longish smudges, but the more experience you get looking through an eye piece, the more you will see.
For now, you're still a n00b at using the scope, so keep playing around with it and trying to find the easy stuff. The rest will fall into place as you learn more.
Good luck!