Hi, E.!
Good for you for trying to curb your spending!
I have been using generic, or store-brands for years, and I feel sure (but cannot document) that I have saved hundreds, if not thousands of dollars in all.
What I have found is that, for most items, the "generics" are indistinguishable from the "name brands". Especially for items that are mixed with other items (like green beans and mushroom soup for a green bean casserole, for example), my family and I have never missed the more expensive name brand items.
I admit, though, that there are certain things that just aren't the same! I think it has more to do with what flavor you get used to than anything, though. For example: for me, real Cheerios are just better than the generics I've tried. Same with chocolate syrup and my favorite mayo. Then again, we found that we prefer the generic brand of salsa to the name-brand! So it really depends!
I suggest you make a game of it! Each time you shop, pick up one or two generic items to try. Be sure to get the name-brand version, too, for comparison. Then when you serve it, put them in separate dishes, tell your family (your husband, in particular) that one is name brand, and one is the generic, and see if they can guess which is which! ;-) (Afterward, if he liked the generic, tell him the price difference, too, especially if it's a big difference!)
Like my family, you'll probably find some things that you're willing to pay the extra money for, and some things that you can use generics for without any noticeable difference, like casseroles, stews, chocolate chip cookies, etc. Even if you only use generics for some of your staples (flour, salt, sugar, spices, butter, milk, bread, etc.), I'm guessing it will make a noticeable difference in your grocery bill.
Best wishes, happy shopping, and happy saving!