I don't cook either,
@Podgypig - can if I want to, but I don't want to, I think it's the worst chore in the world - I'd rather scrub toilets!
Have eaten low fat for years, lots of grapes, bananas, pineapple, cherry tomatos, new potatos, jacket potatos and pasta. If I have to cut the carbs out/down I don't know what's left!
Unfortunately nearly all the things in that list are high carb - in order to avoid diabetes you need to limit carbs rather than fats (don't worry, if you cut carbs then eating fats instead shouldn't make you put on weight). Grapes, bananas, and pasta in particular are really bad for diabetics, and I suspect pineapple is too. You can get away with tomatoes and small portions of new potatoes, and you might get away with small jacket potatoes as you're prediabetic rather than diabetic. Avoid low fat foods as they tend to be high in sugar! I'm not saying you should binge on lots of fat, but it's better to go for things like full fat yogurt and cheese rather than the low fat versions.
Good foods for diabetics include - most meat (but go for high meat-content sausages), fish, cheese, eggs, nuts, leafy vegetables (ones which grow above ground), salad.
OK foods (which as a prediabetic you'll probably get away with) include - apples, pears, berries, root vegetables (like carrots), boiled potatoes, some yogurt (check label of individual ones for total carbs), some ice cream (again, check label for total carbs), very dark chocolate (I eat 85% cocoa).
Bad foods include - pasta, pizza, rice, exotic fruit, dried fruit, fruit juice, packets of cereal (which tend to be very sugary), most things like cakes and puddings, jam and honey, anything marketed as being for diabetics!
Some things vary from person to person - some diabetics can get away with eating oats, others can't (the only way you can tell is to test your blood sugar before and after eating them). Bread varies too - some can tolerate it more than others, and some breads contain way more carbs than others. I can't remember which ones are low carb (as I don't need to - as a type 1 I inject insulin and eat carbs) but I expect someone who's type 2 will be along soon to tell you.
For checking the total carbs in individual foods, this site is very helpful -
https://www.calorieking.com/us/en/foods/ - put in a food, select the portion size (it gives you sensible options like no of grams or a cupful or a slice), and then scroll down to the total carbs. I've found other sites and books tend to show you the carbs in a full meal with all the stuff like sauces which you and I don't bother with.