In my opinion you are behind your peers. Extra curricular activities are nice, but unless you are really good at one of them, chances are that once you get out of HS, nobody will care. That first job, regardless of what it is, teaches a young person a lot about the working world and how to relate to co workers, the boss, customers and so many other things that you just do not get anyplace else. Part time work can also be fun, depending upon your likes and attitude and can possibly give you some idea of what you might like to do in college and the working world beyond collage.
Think about it, two people are applying for a job with identical backgrounds and educational credentials, one has no work experience and the other does - who are you going to pick if you were the hiring manager?