babysitter student

My name is Beatriz. I am 18 and I have just finished my highschool and I am about to enter University of Navarra to study Law (year 2010). I will like to expend the next year (Sepetember 2009 to June 2010) working as a babysitter in Central London. I love kids and I have plenty of energy and enthusiasm to help with children at home. I have previous experience in this job. My main idea is to improve my English but, at the same time, I will like to live with a family (as an aupair) and also receive some payment for my work