Hello teacher,
I'm Jin as a student who will have a class with you. ===> I'm Jin who will be taking your classes. 
Before starting our class, I want to prepare some scripts for myself. ===> I would like to prepare some scripts for myself since . . . 
And, I have to prepare for interview to get a job so i want to practice it, also in our class i want to talk about that with you. ===> I will be preparing for a job interview, so I would like to practice during our class. 
So, before talking together, i will prepare some answer about expected questions in advance. ===> So, before talking with you, I'll prepare some anwers for those expected job interview questions in advance. 
Could you check my writing and give a feedback?
I want to hear and get some feedback, whatever. ===> I would like to hear your feedback. 
And the writings that i made are next pages. ===> And the questions are in the next pages of my writing. 
I'm looking forward to talking with you and I will prepare for that! 
See you next time! ===> Speak with you soon!

Hello, Jin!

Nice hearing from you. I'm taking note of your request and will be checking the following writings from you. Please note of those corrections I've made at the end of your sentences, if you don't mind. Speak with you soon! 

~ Allie