Learn how to cook and do it from scratch. Save money, be healthier.
You can save a lot by making overpriced items from the grocery store yourself. Why buy salad dressing or pasta sauce for a lot when you can make something better with little effort and for much less?
In a nutshell, this is cooking like you great-grandmother used to do. Few shortcuts taken and none of the ultra processed things that not only don't taste good, but cost a lot and are very questionable health-wise.
There's also a series of kitchen basics which is aimed at beginners. Start with a knife, learn to make all the basic things without shortcuts.