How do you take care of kitten. I am watching a friend's kitten next weekend but I have never had a kitten so I don't know how to take care of it. Anyone have advice?

For context the kitten in 9 weeks old. I personally don't think she should be leaving a kitten with someone when it's so young but she's offering me fifty bucks and fifty bucks is good money to me.

This was typed out in like five minutes. Basically I just need advice on how to take care of a kitten

Art on cover is from beastbirthday I think. If I got it wrong please tell me so I can credit the appropriate artist

Photo of kitten