How to determine the right college to go to? And what to study/go to college for?

First I would like to add a bit of background (sorry if it jumps around) - Currently I am almost done with my junior year. For senior year, I am having a lot of art classes, due to taking an AP Art class, and AP Psychology. I will also be using Rosetta Stone for 한국어/Korean (won’t get credit for level 3 because I’ll be finishing that on my own this summer), Japanese, and Chinese.(Previously I took 3 years of German, and 1 year of Spanish.) And therein lies my problem, the languages. I’m not exactly sure what I want to go to college for. I know that I really like the lanuages and cultures of those three languages, but what should I go for in college? I also have a Chinese exchange friend that really wants me to go to China, Japan, and Korea with her in about three years. So while we are in college, (she will be moving to the U.S soon and repeating Junior year if possible), we hope to be able to pay for college while saving up for a trip to each of these countries, 1 week to 1 month each. I am pretty much a complete beginner in all three languages, but I have the most knowledge of 한국어/Korean.

So now for my main question:
I am looking to go to UW La Crosse, but it does not offer one of those languages. It has Chinese and Japanese, but it does not have 한국어/Korean. I know UW Madison has all three, but it is not much of an option for me to go there just for one class. Is there some way, if I get accepted, go to UW-La Crosse, and take Korean through another source and receive credit?

감사합니다! 谢谢! ありがとう! Thank you!