Advice

Alright ladies. My mother in law has been having a hard life lately. She has never learned how to do her makeup but she always talks about how "good" my makeup looks. I want to do something to make herself feel beautiful and happy and my husband thinks it would be a great idea to give her a "make over". The only thing is I've never done makeup on mature skin. So if you are someone with mature skin or have experience with mature skin what sort of advice would you give me? Like types of foundation mostly. She's coming to visit in January so I have until then to practice.