Head boy help

I'm in Year 12 and I'm applying to be Head boy at my school. We have to write a 100-word pen portrait as to why we would be a good student leader. This will be visible to students and teachers who can then choose to support the applications of. Could you please review/critique my portrait?

I would like to be Head Boy because I want to help, lead and represent RGS. I have the confidence, ambition and passion to lead this school, combined with the skills I've gained as a Junior Prefect, current History & Biology ambassador and in other facets of the RGS community. For five years this school has inspired me to try new things, including: rugby (I now play for Guilford RFC), DofE (now completing Gold) and debating. It’s helped me achieve my potential academically and in extracurricular activities, so I would be honoured to give something back to you.