Please help me correct the introduction:)

Good afternoon, my honored professors. Thank you for offering me this opportunity to join the interview, It is an honor to introduce myself here.
My name is Mark Li, I am 22 years old, and I was born in Luzhou, Sichuan, a historical city. I am currently a student in my senior year, and my major is Exploration Technology and Engineering.
During my past years, I spent lots of time on work and studying, and I have learnt a lot.
As a member of the Students’ Union, I have helped organize three great evenings (social events?) and other activities. That was the first time since childhood I realized that I am capable of more responsibilities and am passionate of what I’m focusing on.
As a member of the Young Volunteers Association, I participated in many volunteer activities. They were tough, but they were really worth the sweat and energy. I mean, For example, I used to volunteer to teach in a promote school (what is this?). The children there were naughty, but when I saw their smiles and satisfaction from them after class, I had no doubt that I would keep teaching.
And speaking of studying, I have passed the CET6 and taken the TOEFL test. Also, I took part in some academic competitions in math, English and modeling. Besides basic knowledge I have acquired in class, I have developed a good habit to think more creatively and profoundly which I believe will help me a lot in my future.
However, I am definitely not a boring person. I like singing and playing badminton. Also, I regularly exercise.
And that is all. Thank you for listening!

Good job! Since you are speaking formally, I suggest that you avoid using contractions (write "I am" instead of "I'm") Good luck!