Sophia, sitter in Watford

I am a 20 year old psychology student at the university of reading.
With this degree I hope to specialise in child psychology, hence why I am trying to get as much experience as possible.
I have completed 3 work experiences in primary schools, of ages ranging from 5 to 11.
I have two younger cousins who are now 3 and 8, which I have looked after ever since they were born, often babysitting when their parents were away.
Last summer I was employed at a children's activity camp for a week, in which I was an activity leader assistant. This meant I had to assist the leader with the sports and activities, and often lead my own small group myself, which I thoroughly enjoyed.
I am looking for casual babysitting in my area, as I have a long summer available for work, and it is something I enjoy.