Newbie,
Saying you've only worked in Aviation doesn't mean that much but what it does give you is an awareness of all things that is aviation. Also, you'll make contacts that could prove useful in the future. This does have a catch though, if you're a pain or don't do a good job, that will follow you too. Another advantage is that you'll start earning some money to pay for it all.
At your age, the best thing you can do is work on your studies to ensure you get the best grades you can and play sports etc to continue to develop team skills.