Testing is the only way to know how much carbs you can eat, we are all different. I was lucky and got mine down fairly fast on 85g a day but I know some people need to go a lot lower (or prefer to).
At first I tested in the morning and before and 2 hrs after every meal. Then as my blood sugar dropped I only tested one day a week plus if I was having a new food.
I said we are different - I found the same amount of carbs in strawberries raised my BS a little more than raspberries, so now I stick with raspberries, blueberries and rhubarb with sometimes lemon juice/zest in cooking. It is a good reason to buy fresh raspberries every week! I also discovered I could eat up 1.5 slices of low carb bread if the rest of the meal was carb free, and that while I could have 85g of carbs a day more than 30g in one meal was too much.
The knowledge I got from testing was key to me getting into remission, otherwise I have been guessing what to eat between 6 monthly blood tests at my GPs.