If you made 35,000$/ month what would you do with it.

My father is from Venezuela and for the last 30 years since moving to USA has been making anywhere between 30-45k a month but none of it is being multiplied. My mom manages the family’s finances and she doesn’t know shit like how much we spend a month, or what do to with it other than spend. My dad is begging me to learn about how to multiply money/ invest. Right now my family spends ~ 18k-20k a month to live. With this extra capital what would you recommend.