Cooking and eating at home can save you a surprising amount of money.

The OP meme references Whole30. Your cooking plan doesn't have to be Whole30 (a paleo-based diet plan), although that is what my wife and I have done a few times now. https://whole30.com/

Though we aren't on Whole30 now, the diet really inspired us to cook and eat at home more. You are basically forced to cook at home a ton on Whole30, since few restaurants in modern America offer Whole30-compliant foods, although there are more of them now than there used to be 3 years ago when we did so for the first time.

Before we really started eating at home more, we spent an absurd amount of money on dining out, having food delivered, etc. As in, at one point, food alone constituted 50% of more of our discretionary (i.e. not-fixed) spending. It really ate into our budget: No pun intended.

Being stuck at home during Covid-19 lock-down is a good chance to develop cooking skills. Honestly, I was never a great cook myself, and I'm still not, but my wife is.

If you're stumped for dinner ideas, then try this: (1) Any meat or protein, (2) A starch (rice, potatoes, pasta, etc.), and (3) A green vegetable or vegetable medley. See above for an example. That's a solid, well-balanced, filling, and healthy meal.

And if you make a whole bunch of it at once, then you can have food all week.

(You can always buy Lean Cuisines, or whatever, in the frozen food aisle that have a similar balance of ingredients, but they aren't as healthy or satisfying as cooking for yourself, and eating frozen meals is more expensive than cooking from scratch)

Get into a healthy eating routine, and you will also save yourself health problems and the corresponding medical bills down the road.

Circling back to Whole30: its prohibition on alcohol also inspired us to quit drinking, which has been another great boon to our health and budget.