I know its better to have a teacher, and I do, but in my area all I could get was a conservatory teacher (who will be able to likely tell me if I'm doing the method wrong).

I really just want to be able to get a punkish shouting sound like in these videos

https://www.youtube.com/watch?v=iBNxadj-25c this video around :45
https://www.youtube.com/watch?v=HtkePLlTUcY around 1:00

without frying my voice.

Thanks! (youtube instructional are cool too, but I'd like something comprehensive)
sounds like Davey Havok. in the first video alot of it just distortion added to his voice.

All of these sounds are not loud or shout at all when recording. To do it, relax your vocal cords, support strongly from your diaphragm and sing into the back of your head.

I don't have any videos to give you but this is basic premise. Really not too hard if you fiddle around with it.

I have this one older one on grit that you may find useful. Or not. Either way here it is :