Hi
@New Life style and welcome!
You might be better off with your own thread as you’ll get more responses as this is an old thread - let me know and I can move your post and my reply.
It’s perfectly natural to be shocked and scared/worried when first diagnosed. Your HbA1c of 100 is high, but if it’s any consolation, many of us here have started at, near or above (108 in my case) that number and got down to non-diabetic numbers, so it can be done.
I wouldn’t worry too much about exactly how many carbs to eat at each meal. Initially the main thing is to severely reduce/cut out all the ‘beige’ carbs (rice, bread, potatoes, pasta), limit (or eliminate if you can) root vegetables and replace the carbs with above ground vegetables, or extra protein. This website is a good starting point:
https://www.dietdoctor.com/ - there are paid plans, but you can get all the information you need for free.
Ideally snacks are best avoided, but that can be difficult at first, so if you need something, stick to nuts or veggies or a hard boiled egg or something else low in carbs. Keep hydrated and if cooking from scratch, make sure you get enough salt.
I’d also advise getting a blood glucose meter so you can test the impact of foods on your blood glucose. We can advise on thread most cost effective ones.
A lot to get your head around, but it’s doable and you’re in the right place for support. Stick around and keep us posted!