It is great that you are tracking. There's a good chance that at 47 you can get good control. There are some decisions that you can make, which will directly correlate to your numbers, even if your own insulin production is compromised. The results will vary from no change to remission (or close).
It's all about the food choices. A method that yields consistent results is to replace cereals, bread, pasta, potatoes, rice, over processed foods. This road has been trodden by millions so there are alternatives for most of the meals you would be used to (just prefix for example bread with either "low carb" or "keto" on your search engine or any social media)
I have tried more plant based, low carb, keto, carnivore and have settled on Keto Carnivore higher protein. This means a foundation of meats (real), fish, shell fish, with low sugar vegetables / salads / berries, nuts (occasional seeds). No vegetable oils, grain based flours or sugar.
Breakfast today was as below:
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(I do resistance / weight training and walking almost every day, so need this amount of food - you may need half as much. I eat twice a day, but have tried 1)
Other meals over the last week or so:
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Many do variations on these types of meals. But mine cover all of the essential nutrients and minerals. Much is locally sourced (meats and fish mostly Manningtree Market Essex), produce split between garden, allotment, Waistrose and Morrisons) - 100% Dark Chocolate - bulk purchase from local Vegan shop - Manningtree.