And why did they want you sedated? Was it violence, self-harm, meltdowns?
And it would not be your relatives who would diagnose you, it would be doctors and psychologists. You were institutionalized several times, and nobody ever diagnosed you?
As to the "perfectly sane" judgment, well, you might not be the right one to state that. I certainly have encountered a number of schizophrenics who believed they were perfectly sane.
Anyway, you come in here offering very minimal information about yourself, wanting some escape from "toxic" family, and a primer on how to get a really swell job that allows you to live independently. That's not how life, or this site, works. Stick around and read other people's threads, see if you can pick up some ideas that might help you.