Just me being negative ;) Just me being negative ;)

This sounds like a very natural and casual statement!

I am reading a kKorean novel and Flowers for Algernon right now. I am reading a Korean novel and Flowers for Algernon right now.

I am reading a kKorean novel and “Flowers for Algernon” right now. I am reading a Korean novel and “Flowers for Algernon” right now.

“Korean” is a proper noun and should be capitalized. You should also put quotes around book titles

I am reading a kKorean novel ancalled "Flowers for Algernon" right now. I am reading a Korean novel called "Flowers for Algernon" right now.

I'm really, really doomed. I'm really, really doomed.

I'm not sure about the word "doomed" here. It is a very strong word.

I do Scienceam majoring in Computer's major Science, but I started the college without any knowledge,. I though that even without knowing anything, it'll be okay if I study hard... I am majoring in Computer Science, but I started the college without any knowledge. I though that even without knowing anything, it'll be okay if I study hard...

The correction is the standard way to say it.

I do Sciencestudy Computer's major Science, but I started the college without any knowledge, I though that even without knowing anything, it'll of what I was getting myself into. I thought I would be okay if I studyied hard... I study Computer Science, but I started college without any knowledge of what I was getting myself into. I thought I would be okay if I studied hard.

I do’m trying to get a Science Computer's major, but I started the collegurse without any knowledge, I thought that even without knowing anything, it'lld be okay if I study hard... I’m trying to get a Science Computer's major, but I started the course without any knowledge, I thought that even without knowing anything, it'd be okay if I study hard...

1. “I’m trying to get” sounds better than simply “I do” 2. You should say “course” instead of “college”, since you’re just referring to your major, not your college in general 3. “It’ll should be used instead as you’re using the conditional tense

I do Science'm majoring in Computer's major Science, but I started the college without any knowledge,. I though that even without knowing anything, it'll would be okay if I study hard... I'm majoring in Computer Science, but I started college without any knowledge. I though that even without knowing anything, it would be okay if I study hard...

Everyone seems to know everything, whilen I don't even know what they're talking about. Everyone seems to know everything, while I don't even know what they're talking about.

I know that 'someday' I will learn that, but... I want to improve faster. I know that someday I will learn, but I want to improve faster.

I know that 'someday' I will learn that, but... I want to improve faster. I know that 'someday' I will learn, but... I want to improve faster.

“That” can be take out, as it sounds a bit redundant