I think it can be fun to write about relationships just because so many people can relate to what you are feeling.
I did this one scene in an episode of 'General Hospital', and that was my first job down in L.A. It was, like, my second audition, and I was like, 'Woo! This is easy! This is fun!' That was a really cool moment for me.
I recommend doing some sort of acting class, something that can eventually get you in front of an agent or a manager, and practice is very important.
Working on 'Good Luck Charlie' has been an awesome experience, and it's so crazy to build a fan base and have all those people tune into the show.