Welcome to the board, Lisa!

This site has brought so many kitties into remission, either partly or permanently. And everyone is so kind and helpful.
BTW, what's your kitty's name? We like to get down on a personal level with your cat, too. Even our male members are

Crazy

Cat

Ladies

when it comes to taking care of our furbabies.
We want HEALTHY!
The manufacturers of dry foods would have you believe that a cat can consume their grain and veggie/fruit based dry foods and stay healthy. What the manufacturers have done is cater to the general public's wish for a food that is easy to feed, and convenient to store. I think of them as being like the tobacco companies...there's a lot of Sins of Omission within their advertising programs. Now the truth is getting out, which is why we're now seeing so many new dry foods coming out on the shelf. But they're still not any more optimal for our cats, than living on an exclusive diet of Brownies and Hot dogs is optimal for human health. (Here I need to tuck my tail between my legs, and go hide.
MUST HAVE Brownies, gack! 
My cats eat better than I do, now.)
Cats need moisture in what they eat...they can survive, but they can't really thrive, on dry food... In the wild, they get their water from within the bodies of the critters they eat. Off the savanna and into our homes, cats, most of them, just don't drink enough water. They're programmed to NOT drink much. So our"house lions" go around dehydrated, and that leads to stomach upsets, dry flaky skin, (dandruff), and eventually other, more serious problems. So you want your wet food to contain at least 72% water.
Make sure the wet food corresponds with low carb brands and flavors. Fancy Feast is a good one, and within 'normal' price range. So are Friskies classic PATES, (pates only). There are other good foods on the market, and there's a link in this message board to a whole list of acceptable canned food.
So don't buy chunks, shreds, morsels, whatever

with gravy if you are going low carb. Gravy is flour or corn starch, and flour/cornstarch is actually sugar when it hits the digestive system.. BTW the clear gravies may be made of either guar gum, or cornstarch, both produce a much clearer gravy than flour based gravies. You want the good stuff, (meat based) to be in the first five ingredients on the can. And meat by-products isn't necessarily bad.
(You WILL, however, want to keep some cans of gravy laden foods in your HYPO emergency kit...they'll bring your cats' glucose readings back up if they crash)
Stay away with wet foods that have fruits or veggies, because they're carbs, too. Dry food manufacturers toss them in their foods because they look and sound good to human eyes and ears. It's like putting pleasing colors on the food's packaging.
Cats are obligate carnivores, true meat eaters. Anything else can eventually throw their systems out of whack. Even lions and tigers rarely ingest plant matter, and even then it's usually from the guts of prey, and has been predigested, and only eaten in small amounts. Greens like Cat Grass are mostly hurled back out because they're eaten to help remove hairballs, parasites, and other 'clutter' from the cats' guts. The cat grass sold in most Big Box Stores' cat food aisles, is usually rye grass and that DOES have carbs. Every Carb counts, especially if your kitty is a brittle diabetic, who is very sensitive to changes in BG levels. Switch to wheat grass kitty greens. No or minimal carbs..
And as other members have pointed out, go s l o w. So your furbaby doesn't crash and burn. We're so glad to have you here

You're a good CatMom.