Help improve my summer school oxford uni personal statement?

The reason I want to attend the Oxford University summer school is because it is my dream to study medicine and I know that attending Oxford University would be a fantastic opportunity for me; it would give me a firsthand insight into studying medicine, preparing me for the future degree As I am in year twelve, it would be literally a ‘once in a lifetime opportunity’ as I will never have a chance to apply for a scheme such as this. The firsthand experience would show me how much work I would have to put in to study medicine, thus increasing my motivation and determination in my AS level courses – I need to get the best grades possible. I admire the tenuous work that doctors do, studying for years all to spend their lives caring for others; I aspire to be a general practitioner. After college lessons, I attend a range of funded Kings College and University college London mentoring sessions which gives me information on how to get unto a medical degree, based on their personal experiences. Although this is helpful, can I stress that it DOES NOT allow me to firsthand experience a medical degree. How can wholeheartedly study a degree without fully comprehending what it is about? How can I give my best an enabling me to become the best doctor I can be? This is WHY it is SO imperative that I get unto this course. I am caring, volunteering every school holiday at my local Cancer Research shop; I spend hours cleaning and getting to know the customers which I very much enjoy; it also boosts my confidence. Before I began my AS levels I was a vice leader at my former church youth group; despite the weather conditions, I would fundraise for my youth group, raising money for new equipment. I have achieved a jack petchy award for my kindness and sympathy towards others. My GCSE results, ranging from A*-B were one of the best in my secondary school, I am aware that I am at a disadvantage compared to those who attained straight A*’s and A’s at GCSE; the reason for this was because of the lack of permanent teachers at my secondary school and my parents financial conditions. Nonetheless, I am determined to make up for my GCSE scores with outstanding A levels. I may not be the best in my GCSE scores or economic conditions but I am by far one of the best in my determination and outstanding work ethic. As you can see, I have a thorough interest in studying medicine, please give me this chance and change my life.