The competition experience is amazing at one of these events. My first big event was WWA Nationals a few years ago, it was a great eye opener to see what i needed to learn. You would be riding in JR. Mens, which will be very competetive. However, you won't see the guys like Rahp Derome, Daniel Powers, Kyle Evans, or Nick Galotifore. You will be riding against other kids in a similar situation as yourself.
Don't be discouraged, you will see guys throwing some bigger spins (back 5s or front 7s) maybe a mobe or two in the JR Mens division, but you can and should enter if you are motivated to progress your riding.