How should I start babysitting?

I'm 13 and I live in Sugar Land, a small suburb just off Houston. It's a pretty nice place. Anyways, I really want to start babysitting, but I don't know how to get started. We have family friends with two young kids, and a neighbor across the street with a three year old. Both of them have mentioned me... show more I'm 13 and I live in Sugar Land, a small suburb just off Houston. It's a pretty nice place. Anyways, I really want to start babysitting, but I don't know how to get started. We have family friends with two young kids, and a neighbor across the street with a three year old. Both of them have mentioned me babysitting the kids, but just in passing. How should I approach them about babysitting? Also, we don't know many other families with young kids, so how should I expand so that I can babysit other kids??

P.S I don't plan on sitting kids under three, at least not until later when I'm older, if that helps.
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