Give yourself a chance to adapt to your new environment.
Once you have, then accept invitations from English speaking Koreans. Just tell them what you need. You will find they bend over backwards to accommodate English speaking foreigners. They will happily blow away language barriers and cultural problems for you.
And yes, ESL teaching in East Asia, at times is like babysitting. Students may lord over you the fact that they have been around hakwons a lot longer than you have, but it's still your show. They may take a while to accept new teachers. After 8 or 10 months they will get attached to you and will be better behaved.
I knew one Korean teacher who brought a big plastic water gun to class, never used it, only had to threaten to use it.
What may still work is the old "Three check marks on the board and the student is out of the class" trick.
Cheers.