I Babysit

It's been almost 3 weeks now when my older brother moved in the house . He and his wife are both working .. They really intended to move here so that many people could take care of their child who is 7 months old .
Since I'm studying and one class is only 3 hours , before and after attending classes I have to look after my niece , sometimes mom or my younger sis .
It's really challenging and I find it very difficult to take good care of a child . What I'm doing is for free ....I couldn't read anymore or do my schoolworks but what can I do ? I can't complain ..
Anyway ,I realized that being a mother is not really easy . I'm getting nervous for having a child soon . Haha