There are a few systems in place to minimize your involvement with the grocery shopping. You can ask Eve in the morning to go run errands for you, and Angelina (Mom) will automatically cook the ingredients you buy. Managing money however is a core mechanic of the game. Among a ton of other things, it's what drives MC (Alice) to "put her relatives to work", so it's essential to the game. There aren't many timed events in the game, and those that are interrupt gameplay, so you shouldn't be afraid to spend 3-4 entire in-game days to spam-click "work 4 hours" in the job menu, and that should set you up for your entire playthrough.
