This is not a drill.

I have to submit my resume to a university until this weekend.

This is not a drill.

This is a job hunting.

This might be all about my future.

I'm writing my research plans and my aspirations.

They are becoming too long text.

I'm tired.

• This might be all about my future.
• My future might depend on it.

• They are becoming too long text.
• They are becoming too long.

Good luck! You can do it. Job hunting is always nerve-wracking, so there is no other option but to stay strong ^_^

• I have to submit my resume to a university until this weekend.
• I have until this weekend to submit my resume to a university until this weekend.

• This is a job hunting.
• This is a job hunting.

• I'm writing my research plans and my aspirations.
• This sentence is perfect! No correction needed!

• They are becoming too long text.
• They are becoming too long text.

  I might rephrase it to something like this: "It is becoming too long of a paper."
  
  "It" in this sentences refers to the paper (singular) that you are writing, not to the plans (plural) themselves.

• I'm tired.
• This sentence is perfect! No correction needed!

Good luck and keep at it!