help me to correct.....thank you

Today I am in a bad mood since I am finding some
problem of my life.
Correct:
since I find / have found some problems
in my life / that cannot be easily solved.

I am very depressed and do not want to share my feeling to
my close friend.
Correct: share my feelings with my close friend.

The problem is quite serious for me to
decide my future career. ( Unclear statement )
Correct: The problem may deny my future opportunities /
The problem may hinder me from getting a good job /
Solving the problem may open me doors in future.

I hope somebody can help me to solve this problem.
( Correct )

But finally, I determine using my own way to solve it.
( Wrong usage )
Correct: But finally, I decide to solve the problem myself.


The problem is my English is not very good and take the
public examination quickly.
( Wrong subject-verb agreement )
Correct: the public examination is approaching. /
I'm going to take the public examination very soon.

The solution is only practice more exam paper.
( Wrong agreement. Double verbs)
Correct: The only solution is to practice more / do more
exam papers.

Comments:
I think that your foundation of English is not so good.
Your sentences lack coherence and are full of errors,
especially grammatical ones.
I suggest you practising your grammar by using a grammar
book instead, since writing an error-free passage is your
foremost objective.
You may also read more newspapers to enrich your
vocabulary bank and learn more about sentence strucutures.
Try to use more complex sentences rather than repeating
simple ones.
Also, I think that it is not effective for you to improve your
English by doing pastpapers, since they only test your skills
on paraphrasing, but not your basic writing skills.
Keep going
圖片參考：http://tw.yimg.com/i/tw/ugc/rte/smiley_1.gif

Today I am in a bad mood since I am finding some problem of my life.
I am very depressed and do not want to share my feeling to my close friend.
The problem is quite serious for me to decide my future career.
I hope somebody can help me to solve this problem.
But finally, I determine using my own way to solve it.
The problem is my English is not very good and take the public examination quickly.
The solution is only practice more exam paper.

Today I am not in the mood that finding some problem of my life.
I am very depressed and do not want to share my feeling to my close friend.
The problem is quite serious for deciding my future career.
Hope somebody can help me to solve this problem which is my English is
not good and take the public examination swiftly.
Finally, I determine using my own way to solve it which is practice more
exam paper.