I'm glad that you explained that you have some health issues to deal with, that make you tired so we can answer more appropriately. I hope your health will improve. And I'm glad that you're paying attention to the quality of your child's food ingredients.
So, with your medical issues in mind, there's a couple of things you can do that are fairly simple.
The first is to make a huge quantity of a healthy homemade broth. Over the next couple of weeks or so (or however long it takes) save the bones from several chickens. These can be from those whole roasted chickens from the supermarket, or from chickens you cook at home (that will be better, because you can control what seasonings you use, and you can use very little salt. Just cook a chicken once a week and in 4 weeks, you'll have a lot of bones). Just throw the bones in the freezer. No need to pick every piece of meat off them or break them down.
Then when you have about 3 or 4 chickens' worth of bones, put them on a large sheet pan or in a couple of cake pans. It's ok to do it in batches, and it's best to roast them on parchment paper or non-stick foil so you don't lose any of the great stuff that will drip off. Roast them at about 425 degrees for almost an hour until the bones are a deep mahogany color. Dump everything (the bones, any pieces of stuff that fell off, any drippings or charred bits) into the largest pot you can get. 16 quarts is great. Fill it with cold water and bring the bones and water to a light boil, just over a simmer. Let it go, untouched, for several hours - about 4. Then use a strainer to remove all the pieces and bones from the liquid. You'll usually find that there is lots of nice soft chicken meat that can be used in a recipe.
Now boil that liquid until it's reduced, by about a third. Taste it. It should taste like a nice deep chicken stock, but it won't have any salt or other seasonings. Pour it through a fine colander or sieve to strain out any pieces. Now, you can measure out one-cupfuls to store in freezer bags or small freezer containers and you will have made a LOT of great-tasting healthy stock to use as your base for many things. The same can be done with beef bones. I freeze mine in quart-size zip top bags, and I lay them flat to freeze so that I can stand them on edge later and save room.
And I'd suggest you get a good blender, the kind that can make pureed soups. Some people like the Ninja, some prefer a more expensive, longer-lasting kind like the Vitamix. You can throw raw foods (cut up, peeled sweet potatoes or winter squashes, carrots, a peeled onion, and a small amount of chicken stock) into the mixer and in 10 minutes you have a pure soup from ingredients that you can trust. You can make homemade applesauce in seconds. And fruit drinks, etc. The list is endless.
It's more than the sodium that is so troubling in our foods. It's the quality of the salt - it's refined, bleached, and cooked, and additives are in there, too. Unrefined salts are best, and they're the only ones we use (Redmond RealSalt, Himalayan Pink Salt, Celtic Grey Salt, etc). And the foods are filled with carageenan, guar gums, xanthan gums, and dozens of different kinds of sugars (anything ending with -ose, -itol, etc). And food colors!
If you can't make the stock, try using the Kitchen Basics brand (unsalted variety). It's excellent.
If you just make some stock and use a good blender to make homemade soups in seconds, you'll have taken 2 important steps towards improving your eating plan.