Welcome, I'm assuming your diagnosis is fairly recent and being scared, overwhelmed, in a spin are all very normal reactions.
I see you give what is probably your HbA1c in another post as 89, and the reply there explains the different units. It's an average of your blood glucose over the past 10-12 weeks. It measures glucose stuck to red blood cells, and that's how long they live.
No mention of diet... I gather your new medication is intended to work alongside diet & exercise, though there are plenty of people here who have started with a higher HbA1c and got down to pre-diabetic levels with just diet and exercise. They have usually lost a lot of weight in the process.
The main principle of their diet (mine also) is very reduced carbohydrates. Of course if you cut out most of a major part of your diet you will feel hungry unless you replace it with something else, so vegetables (apart from root veg), fruit (berries, plums, kiwi fruit and grapefruit), full-fat dairy, some pulses, meat, fish, eggs are all good.
If you want to try that route there is lots of good information on this website and others. It also leads to starting to read labels on processed food of any kind very closely!