Don't take on debt if at all possible. If you use a credit card, try to pay it off each month. Don't get one with annual fees. Get one that has cash back not miles or points.
Learn to make your own coffee instead of buying Starbucks or whatever. A decent hand grind will last for a decade and cost around $50. A no name pour over dripper and filters are a cheap way to make coffee at home. Buy beans and keep them in an air tight container and they will be good for a month.
This is a recipe that my grandma taught my while she was still alive and I'll pass it on to my nonexistent children when they are old enough to drink coffee.
A no name pour over dripper and filters are a cheap way to make coffee at home.
Moka, French, and Turkish give you better results, don't require disposable filters, are usually cheaper, and aside from Turkish don't require experience to make good coffee.