So, if I managed to post this on the right place, good. The thing is that I'm concerned about my voice, singing voice. I usually sing when I'm walking outside or when I'm playing with the electric guitar. I manage to set "a perfect harmony" with the chords and with the singing voice and just with something I play. But I only manage this on certain places on the guitar.

This is not the only song I've been trying to sing but.. http://www.youtube.com/watch?v=Adq49rK0atQ The song Before the lobotomy by Green Day. I've tried to sing the beginning of the song but no... If I've got headphones on and I'm listening to the song, I'm able to sing, I guess. But if I recorded this while having headphones and the song playing, I always end up in the thought of a gun in my mouth (just a random symbol about my frustration). I don't like my voice and when I'm trying to hit the high notes, no... I won't be taking any lessons as I doubt we don't even have any at this town. I'm a 16 y.o boy with problems on managing to sing high notes..

Then people claim that if you have sung with "an improper voice" (which I think I have done) you have ruined your voice for ever? If this is true, gg.

Topics like this http://www.wikihow.com/Sing aren't helping at all.
Last edited by Billie_J at Mar 2, 2014,
One of the most important concept when it comes to singing is to NOT strain your voice.

Relaxing in your throat, neck, shoulder and chest area, taking the breath from your stomach and not from expanding your lungs. You should also relax your abdominal muscles when you inhale so that you won't hurt yourself. And you're still young and your vocal cords are still developing!
If you want to learn to sing correctly and preserve your voice this is a good place to start. Pete Strobl is a long time friend and voice coach who has worked with the best. See his blog for excellent tips and instruction on vocal music :

"Your sound is in your hands as much as anything. It's the way you pick, and the way you hold the guitar, more than it is the amp or the guitar you use." -- Stevie Ray Vaughan

"Anybody can play. The note is only 20 percent. The attitude of the motherfucker who plays it is 80 percent." -- Miles Davis

Guthrie on tone: https://www.youtube.com/watch?v=zmohdG9lLqY
To ruin your voice for good, you would have had to do something extremely unorthodox.
It would seriously be difficult for you, and almost impossible if you've only sung for yourself.
So I can almost say with 100% certainty, that you have not ruined your voice