Mid-autumn day Composition Please help me to translate the following into English.

The Mid-Autumn Day is an old traditional festival in china. We will be in the Mid-Autumn Festival to do a lot of interesting things.

First of all, my family and I will go to the supermarket to buy some fruit mooncakes. My family and I will go to the supermarket to buy some fruit mooncakes. Then go and look after my sister, and she with other little friends. Then go and look after my sister, and she with other little friends.