Re: What do you REALLY want to teach?
In order to be a good teacher, you have to adapt to your students. You are new in teaching Aikido, so most of your students are probable new to Aikido. Try not to drown them with advanced ideas and concepts. Too much of a good thing is a bad thing. They might feel lost, and some might even quit. For the moment, most of them probably want to have fun and/or defend themselves. Give them just that at the beginning, and as they improve, they will have a hunch that there is more to Aikido, and they will start asking questions. Or for those who don't seem to see the bigger picture, you will guide them gently and progressively.
Patience is a martial art virtue.
Congratulations for your achievements in the art, and take it easy. Let experience guide you.