I have gestational diabetes and god damn it sucks.
Anyways, i ended up actually countinc my macros, since it's not easy to eyeball portion sizes and the common sheets docs hand out are fucking hilariously wrong, plus they don't even factore in fruits and stuff like vinegar or tomatoes, who also have carbs.
I was also surprised to find that it greatly influences my blood sugar if i est the leas refined versions of something. Namely oats. I always had pic related and i stuck to the right amounts, but it always screwed with me. Then i tried steel cut outs instead and it made a big difference.
Also, make sure to always combine carbs with fat or protein. It will "soften the blow" of the carbs and not make your blood sugar rise too high and fast.
Generally, eat 5-6 meals a day (3 main, 2 snacks and depending on your fasting level, you might have to add something like a glass of milk before going to bed) and strictly stick to wholegrain.
I make sure i ALWAYS carry the snacks with me, so i don't get caught unprepared. I usually take something with me like almonds, a boiled egg or cottage cheese.
In the morning i have a bowl with stewl cut outs, one fruit, milk and unsweetened joghurt.
Today i ate whole wheat bread with smoked salmon and half a cucumber for lunch.
Dinner was chicken with mushrooms and sweet potatoes.
I had almonds and a boiled egg inbetween and am going to drink a glass of milk later.
Exercise is also very helpful. You don't have to go all out right away, a walk after eating is already an awesome start!
Also, completely cut out all sugar. Seriously, if you don't make exceptions it will be easier.
The hardest part for me was cutting back on fruit so drastically. I really love eating fruits...
Do you have to inject insulin?
Good luck, user.