That's quite the accomplishment if you're the best Sheik in Indiana with only a few tournaments under your belt (granted, dunno how many Sheiks are in the area, etc). Wish you the best at The Big House 4. I'll be watching
I've never attended a "big" tournament myself, but I'm sure the experience is more intense with more big names in the community out there. In your shoes, I'd probably go in with the mindset that it's just like any other tournament for the most part, just with more entrants. I'd imagine that staying relaxed will be the biggest thing. Just play your game.
On another note, welcome!