Hope you feel you can post again Alex, if you need to rant this is the place, being newly diagnosed as a teenager is very tough and everyone here understands that, we may be a wide spectrum of ages but we were all your age once, yes whether you want to believe it or not we weren't born middle aged!
There is quite a few young people on here too that may be able to help you
Not everyone is T1 and had to cope with as a young person but we all have life experiences that may be helpful