I found one Indonesian food here. As expected, it was expensive! Chicken satay costs 14000 won, a.k.a more or less IDR 160.000
In Seoul, there’s store in Itaewon (line 5) which sells Indonesian dish. You can also find ABC sauce, Indomie and another typical Indonesian food.

Never thought that Yangnyom chicken and ABC sauce would be this luscious!
2. Bring pictures and other memorable things.
I know it’s kinda old fashioned, yet seriously it works. Bring some pictures of you and your family, friends etc. Put it on your desk.
Why desk? Because mostly when you’re living in a dorm, you won’t have much space. You’ll do a lot of things on your desk. So, whenever you do something there, you can see those pictures.
Pictures speak thousand words and memories. You'll feel that serenity inside your heart. Few months to go and you can meet them!!
from my sistaaa
3. Meet Indonesian there
Studying abroad helps you to improve your English or whatever language you use there. It’s a good point. However, sometimes you miss talking in Indonesian, right?
Find Indonesian people there. Do something fun with them. Do something stupid together. Travelling and being lost together can be a nice idea.lol
Perhaps, you can also cook Indonesian food together. (too bad that Sogang dormitory does not have kitchen).
4. Stay in touch with your family, friends and other special people.
Keep contact with your friends. Exchanging some stupid pictures through Snapchat helps a lot. I do that much times ;)
Set the schedule to have a video call with your family. Considering the time gap, you need to find time which is convenient for both you and your family.
For you who’s currently in Long Distance Relationship, please please please be careful.
Communication is really important to nourish your relationship. Even if you’re tired, spare time for him/her. A day that you don't contact each other, you’ll get used to it. You’d realize that your relationship stopped working when it's too late to fix it. Trust me. I experienced it few years ago.
Can you imagine if you need to write in the piece of paper and wait for weeks to get your letter just like Savannah and John? It's sucks and miserable!
Now,you're provided with those application (messenger, skype, snapchat, whatsapp, etc) which can help you to fight the distance and time difference between you and your beloved ones.
Hold on for few months and everything's gonna be fine!
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When I say that I miss home, some people ask whether I was happy staying here or not. I am happy living in Seoul. It makes me realize that no matter how happy you are in your new place, you will always miss home. Home is where you belong to.
Cheer up! Enjoy the time you have while you’re staying abroad, because once you go back you're going to miss that place. Lastly, keep in mind that you will be home soon!!