Be sure to wear hearing protection whenever shooting. In fact, double up - soft foam plugs + ear muffs, just to be safe! Even .22's. And if anyone tries to give you crap about wearing ear plugs, to heck with them. If they want to screw up their hearing, let them. Do not let anyone pressure you into shooting without hearing protection.
I have read studies where military service members had their tinnitus decrease after some time, and for some it did go away.
Give it six months or so. If it's not gone by then, there's a good chance it may not go away. Not trying to scare you. But look, I got my T from ONE gunshot in an enclosed space, and it's been over a year. It was heck at first, but now it's now a non-factor in my life.
So even if it is permanent, it is not the end of the world. And you are young, and believe it or not, younger people can sometimes roll with things better than older people. I got my T when I was in my mid-40's, and this old fart had trouble adjusting to it. But it's not an issue now.
Also, keep the music down on the ipods, etc. Good luck. No matter what happens, you will be ok.