Misael, child care in London

I am a seventeen year-old student in need of a part-time job and babysitting is a good possibility for me. Children have always enjoyed my company and I feel with this and the fact that I am mature and responsible, I will be a good candidate to consider. I live in South East London and I am fully flexible on Saturdays and Sundays from early mornings to as late as 8pm at night if necessary, I hope you can consider my request; It will be much appreciated.