Re: When I used to live
You're right that that sounds awkward but it would much easier to say "When I lived in Korea, I wasn't used to using chopsticks" or "When I moved to Korea, I wasn't used to using chopsticks".
Originally Posted by keannu
The first suggests that regardless of how long you lived there, you never got used to using chopsticks.
The second suggests that at some point during your time living there, you finally worked out how to use them.
Remember - correct capitalisation, punctuation and spacing make posts much easier to read.