Change Header size & font.

Hi there,

My website is http://www.royalballetacademy.net. I am a novice and designed this website around a template myself. It took me ages but I don’t have alot of money. For example it took me a whole day just to figure out how to have stars scrolling from my cursor, but I love it and so proud I did it. Anyway, How can I enlarge the font on my title page. Its soo small and its white and the font is bad too. Please take a look and help??? thx.. Anna