How competitive is the average applicant to internships/jobs

I'm a pre-engineering student at a CC and want to start working on personal projects for mechanical engineering. I'm very perfectionistic and have always pushed myself really hard at everything, even past the point where everyone else stops and I don't need to keep going. My dream is to work for a prestigious company after I graduate, and I was wondering, am I really improving my chances by pushing myself really hard outside of school, or am I a dime a dozen (I'm transferring to a big state school). How much competition am I up against?