Home-raised rats will already be used to humans before they come to live with you. A pet store rat will probably be shy, and may take a long time to tame. We go to the Boss's house, where we have a bigger cage with a second floor and a hammock. Most days the Boss opens the door for us for a while, so we can come out on the table top. We play in our bucket, and climb stuff on the table, jump in and out of our rat carrier, do little rat dances on the table top and drag all the papers we can find into the cage.
Rats are nocturnal.
That means we sleep during the day and do our stuff at night, mostly. We can wake up during the day for a snack or if something interesting is happening, but mostly it's our naptime. We wake up and start partying about the same time your parents go to sleep. They don't have much hair, so they help us stay cool in hot weather. They are long, so we can use them to help us balance when we are climbing or standing up on our hind feet.