Going from MO to NY Yeshivish will be transition. If you put Torah first, you�ll do just fine. If you are bothered by �yeshivisha shprach� you�ll be continuously unhappy.
The yeshivish world of America carries a lot of weight on of the �yeshivisha� mindset. It�s there because it helps keep the standard flow. As someone who went through it, without being comfortable, I can tell you that I had no no issue with the sprach. I had my own struggles and was, and remain, deeply appreciative of the yeshivisha oilom who never ostracized me for my own shortcomings.
I always felt welcome and I always felt the push to self improve. Hopefully, you�ll feel the same.