Motivation letter

Hello,
I've been wondering if anyone could help me improve my motivation letter. This year I am graduating and I need to write a letter of motivation for universities I would like to attend. If anyone had the time I would be very thankful. Few of many mistakes I am sure of are commas. I have literally no idea where to put commas, because at our school leaving examination (essay), they don't take them into consideration so we do not learn where to put commas at all.

"To whom it may concern:
Dear sir/madam,
My name is Adam Vranay. I am 17 years old student attending a Grammar school in Bratislava, where I am graduating in May 2015. This motivation letter is written due to my interest in applying AP Degree Programme in Computer Science at Zealand Institute of Business and Technology.

I have been interested in technology since I can remember. The main reason for my interest is probably desire to participate in creating innovations that could lead us to a better tomorrow. I got my first programming experience when I was 11. I started attending a Grammar school in Košice, which was specialized in information technology. Naturally at such a young age, we were only trying to understand basis of both software and hardware engineering, but I immediately decided that technology is my future. After 4 years I started attending Sports Grammar school in Bratislava and started living basically on my own, besides my family supporting me financially. I kept my interest in technology, especially in software development but I also continued doing gymnastics as it was my main priority at the time, since I was and still am in Slovak national team. I believe that doing sport for almost 12 years contributed in my personal and social development. However, I am now fully prepared to show as much if not even more dedication and focus in studying computer science in Denmark.

In my interests definitely belongs meeting new people, especially foreigners. I have always found different cultures interesting and I am more than willing to learn more different languages. Currently I speak Slovak and English but I can understand Czech perfectly and I have quite few experiences with Russian speaking people. I have been also learning German for almost 8 years now and I am looking forward to both, learning new languages and improving the ones I am already familiar with.

The biggest advantage I see in studying in Denmark is the opportunity to study in English and at the same time learn Danish. The education system I believe is one of the best in Europe. The Computer Science Programme at Zealand Institute of Business and Technology suits me very well and I think it is one of the best facilities to learn Computer Science in whole Denmark. I have also recently read about Roskilde campus and it seems like an amazing place to me. I would be definitely honoured if given the opportunity to study at your institute.

Thank you very much for considering my application. I am looking forward to your positive response. "

Thank you very much for all answers.