I have like a "babys first playschool refrigerator/freezer" thing that basically belongs in a camper, but I make it work. The key for me is to cook things kinda "basic" as in limited, generic, seasoning and then spice it up how I want when I'm ready to eat it so it doesn't get boring. Then as others mentioned you cook all in one day. I make a chicken dish in the slow cooker that lasts a week in the fridge, so you shouldn't need a freezer for your weeks worth of food.

I buy a family pack of chicken and separate a few breasts to stick in my tiny ass freezer that doesn't even have room for a normal size ice cream tub, I freeze a few rolls, and anything else like vegetables is generally canned so I don't need to worry about waste.

You save so much money when cooking for yourself!