alrighty! Whatever is easier for you though (I HAVE GOOGLE TRANSLATE)

Oh boy

Welcome!!!(환영)

Hello there

Welcome back Hadooy!

Yay! I'm glad you are back ^^ (I'm learning english too)

yea im korean and u must not be very good at korean because what u wrote sounds just like something that comes out of google translate-- ur english is actually much better than ur korean? heres what i wouldve said: 안녕, 얘들아! 인제돌아와서 너무흥분헤! 영어를 배웠어. 나중에 새러운그림을 올릴거야! 기데해줘요!:) when using korean, you place the words in different places than english words. it sounded funny when u said it because most koreans get confused learning english because of the word placement americans use.