I was very excited and waved at everyone as I walked past.
Why did you feel a need to wave?
In my mind, I kind of want to be a superstar.
It's understandable that you felt a lot of positive energy and wanted to share that with others. It's good spread good energy to others.
I wasn't trying to share that with everyone, it's just that I wanted to be an actor and I needed to get out of my comfort zone.
Oh, I see, you were practicing your craft in order to become an actor.  That sounds like a great way to do it, however, if you needed to work on displaying negative emotions, I would have to warn against treating strangers that way.  It is not fair to scowl at passersby or to otherwise treat them badly just to practice your acting abilities.