What will i expect when we go to Korea?

Honestly, you can easily go to google.com and search "How to speak korean" and 9 out of 10 you will find a site that will teach you the basics of korean language. I would recommend just taking a English-Korean dictionary instead because korean is a language that takes time for you to learn and its Little difficult but you can give yourself a try and see what you can learn from now to december. Don't forget to try the kimshi while you are there!