You will have to live with a glucometer for a while.
For now you might have to do more measuring.
Measure once before the meal.
Measure about 2 hrs after the meal.
Buying the fancy meters with the expensive strips aren't any better than the ones that are generic with the cheaper strips so save money. Because strips can add up.
The reason for measuring before is that's really the only way to know how much effect the meal had on you.
You'll have to do this until you find a diet at a mix of foods you enjoy and also helps you control your numbers. Research LCHF diets. That might be a good place to start.
The research I've read is trying to keep too tight control on sugars is not good for you. Just try to keep them in good ranges. Enjoy each meal.
If they are a little bad right now, then don't kick yourself. You're still getting use to things.
Eventually, you'll have a good idea of what's working and what's not and you wont have to do so much measuring.
Be well
do you have a blood sugar meter?
If you do, then test 1.5 - 2 hours after starting to eat.
If the food you ate results in blood sugars < 140 (ideally < 120), then you have made the right selection. This is called 'eating to your meter". If your sugars are higher than target, then you should try less carbs or different carbs at the next meal.
Sugars should be minimized, as few as possible.
Carbs should mostly be from non-starchy vegetables and minimally processed foods.
Diet should be low carb, moderate protein (about 1 g / kg of body weight), and high healthy (non-processed and traditional) fats.
Paleo style diet may work, as could mediteranean style diet (but reduce the grains).