urgent ^^speak with a client the action is give a consultation??? or how do I say consult?? I

how can I say this? Im confused about the use of 한태, 위해how can i say I was worried ABOUT YOU, I will do this thing for you, , I mean the use of FOR is different depending of the context?? and BECAUSE too,im confused, I didnt go to the gym bacuse it was closed, I didnt studied because I was tired, because the house was expensive I dint buy it.

how i use 할거야, 할게, 하겠어요?

I would like to know what is the differenfe between 난,제가,내가 how does i use them

what does 귀염둥이means?

how do you say "this" "something" "somebody" "i think" ? ex. i think you dont like it somethong happened somebody is coming

First notebook entry: Introducing myself 안녕하세요, 저는멕시코사람이에요,한국문화고사람을촣아서한국어를공부하기배우고있어요,저진짱삼년전에한국언어를사랑해빠졌어요ㅎㅎ아주촣아요