When I lived in Maine, I figured I should learn how speak English in the manner it's spoken there. Try as might, I was told I couldn't and wouldn't ever get it right.
Maybe they were just playing with me. Could be it can be learned only as a 1st language. Perhaps it's in the genes. Might be it's all part of their sophisticated training in detecting people from away and proper pronunciation is so subtle only natives can detect a difference, I don't know.
I may be a dumb Dutchman who will never get it, but I'm still willing to try, so give it your best shot and have fun with it.