The result of my presenting test

I did not have a not good presentation, which makes me so sad. I have been nervous, afraid of my testing results. Perhaps after this test, English will become my fear. Oh, today, a thing I am lacking of the most is self-confidence. This feeling is bad for me I do not like this feeling. It is empty, hopeless,.. But "C'est la vie!" (meaning: that is life! ); thus, I decided to join a guitar class. I hope that in this new environment, I can try my best to improve my self-confidence.
Fighting.....
There are sometimes when you are disappointed with the things you meet in your life. Just keep calm and get a beautiful smile. (This wording is odd, but in general english it can also be acceptable) Everything will be okay! :)

I wish you luck in your class! I have heard that taking a class such as this in your target language is extremely useful. C'est la vie is one of my favorite phrases, it being in French does help that though ;)

I'm not entierly certain what you mean by "scare", but I hope that I understood correctly. 

Good luck, and yes, try try try! You will get there!