I corrected the text for you.
You did quite well.
"<em>My name is Adriana, I am 14 years old and in the 9th grade. I have a shy personality, I'm talkative, but mostly embarrassed. However, I am brave ,tenacious, and I am a highly ambitious person. I will never give up on anything. While I still have your attention, I would like to make my intentions clear on why I should be elected as your class President.</em>
<em>I promise that I will be careful with things that are to happen in our school. I promise to make learning fun for everyone. I will encourage people to help each other and if you vote for me, I won't forbid phones from being used on school premises. I will be open to any and all ideas. You can count on and trust me. I promise to help make this first High school year unforgettable. My biggest quality is to look on the bright side of life. There was a time in my life where I wanted to give up...but I remembered that life was a beautiful gift and that everyday is a new day with a new story.</em>
<em>In our school, there are problems....that is with mischievous individuals who disappoint other kids from this school. I believe that with all of these traits, I can promote and improve this class. To do this, I will always look out for others by devoting time for their needs. I promise to give detention to those who misbehave, but also give rewards to those who don't. I won't be disappointed in those who make mistakes, but instead, teach them the right and smart thing to do. I am confident that by being class president, I can make our class a happier, better place.</em>
<em>If I were elected president, I can assure you that no problems are to arise in any way. After I am elected, this class will be remembered as tenacious, brave, orderly, and smart. After all, a bright class is the right class. In order to succeed, I need your allegiance and support for me as class president,</em>
<em>I hope you will vote for me! Thank you!"</em>
