I stole money from the school, although I do not regret it.
Why did you steal the money from the school?
I stole around $100 so I could buy some clothes.
You admit you stole something, at least for that. Being unremorseful seems to be strange, have a conscience and give it back to them even now unanimously. It won't be good for your mindset if you always harbor this wrongdoing of yours in your head.
School is a lost cause, kids should just riot and blow up the place.
Your wishing so much destruction over such a minor infraction.  Stop stealing and if school isn't to your liking, then drop out and get your GED. School isn't a requirement to success, fuel your own education and push yourself to learn what you want.