Q1. please check again. or you can make a question with a example sentence.:)
Q2. #스스로 하다 = do by yourself, do on your own, do something only with your power.
ex) Clean your room by yourself.
너의 방 청소를 스스로 해라.
#혼자 살다 = live alone
ex) I am living here without my family(alone).
= 난 여기 혼자 살아.
Q3. #첫 눈에 반하다. = fall a love in a first sight.
#첫 반 보다 ... please check again.. :)
Q4. #마음을 쓰다 = have a sympathy and caring mind
ex) My hair got turned white cause i've cared it too much so far.
= 그동안 마음을 많이 써서 내 머리카락이 하얘졌다.
#걱정하다 = worry
ex) You must come back home early! Mom will worry about you.
= 집에 일찍 들어가! 엄마가 널 걱정할거야.
Thanks for reading~