Smoke would be a good indicator of a TERMINAL issue that as a kid of 12 you might not be able to fix.
It doesn't take much stray voltage from "experimenting" to blow these up even something as small as 3 volts in the wrong place can pop them.
Take it as a hard earned lesson and buy a new one.
A little more reading on electronics might be needed and a little more attention to detail.
You are not alone. As an older guy I too have popped a few things in my time but on each occasion I have a new lesson under my belt.