As I've stated before on this board, there is NOTHING that makes me happier than a new SK book: no movie, no tv show, no video game, and VERY few big life events.
I read Skeleton Crew when I was fucking five years old, lol. My parents were impressed that I was reading it, though, and decided to let me finish.
In 1991, at eleven, I read Needful Things, and The Wastelands (the third dark tower book,) and I experienced something like you're experiencing now. I'd found my favorite writer of all time. It's just his VOICE- his narrative voice. I don't know how else to explain it. Ever since then, since 91, I've anxiously awaited and devoured every SK novel, short story collection, and novella collection.
I also backtracked and read everything from the seventies and eighties that I might have missed.
I am SO happy for you: you're going to find treasure after treasure. SO fucking many of them are masterpieces, and, even with books like The Outsider, when I say it's one of his WORST, that damn sure doesn't mean it's BAD: rather, it's just not one of the best.
They're ALL fucking great.
I wish I could unread them, and be where you are, now.
Edit: oh, and, if you like Outsider, you REALLY need to read the Mr. Mercedes trilogy, wherein Holly is an apprentice to an older detective, and then, after that, the epnymous novella in "If It Bleeds."
Outsider is basically part four in a five part series.