Learn the alphabet first! That's what I did. :) 

Learn to write and  read. 

Try to find here someone who is Korean and know Arabic.

Or just do what Ema said,I agree with her. :)

learn Korean-lesson 1 ( Arabic sub ) only 2 videos for Korean alphabets

https://www.youtube.com/watch?v=6lL0pSaEECs

يلا نحكي كوري مع جي 1. 아랍어로 배우는 한국어 (Arabic-Korean) 27 videos

https://www.youtube.com/watch?v=0e9y-4LXow4&list=PL0qFXU4EupQkaUPYdFzjnSgodN_l9EL0j

تعليم اللغه الكوريه الدرس الثاني ( التعريف بالنفس1)

https://www.youtube.com/watch?v=vpoAsErbMCE&list=PL424766D86BC439BF

There are more videos for the beginners on youtube.

hey nimah ! :)

it's ok !

try to find someone who is an Arabic native speaker and learning korean. so you can study with him/her..

or find someone who is a Korean native speaker and knows Arabic (in a high level) so he can help you ! :)

Good Luck nimah !!