What are the numbers underneath my username?

I can't see them, but yeah that's your age.

It's not showing to me, probably cause you're a minor
You can go to your profile settings and choose to hide it

It's you are range. You can hide it in your settings, but it won't change who you can contact or who can contact you

Those numbers are your new real name while you serve your sentence here. Get used to it and stop your bellyaching.

😂