Hi welcome. You have come to the very best place to find more information and get support.
All the advice given so far is excellent.
I would also like to say that with the right management approaches (lower carb eating, weight loss if appropriate, exercise), early diabetes (that is what prediabetes is) can sometimes be put in remission. This remission may be permanent or it may be temporary.
You will be fine! Diabetes is ultimately a manageable condition. Yes, lifestyle changes and monitoring are required. But many things in our lives change over time and this is just another thing that can be accommodated.
You did not cause your diabetes. No blame here. You just got the wrong end of the straw, so to speak. I would also like to tell you that the numbers you will see on your meter and your test results are just numbers, information to act on. They are not good or bad. Your worth is not tied up in those numbers.
Keep asking questions. No question is trivial. We've all been there, some time ago, in the first shock of an unwanted diagnoses.
I looked at your profile that you are in your late 20s and have strong family history of diabetes. This may make you even more worried about your future. Times and tools have changed and I repeat, you will be fine.
I will give you a heads up here that if your blood sugar numbers do not respond as expected to diet, exercise, metformin, this may be a grounds for further testing. In adults, not all diabetes is type 2. There is also a possibility that your diabetes is adult onset type 1, or other type.
If you're the researching type, the best book I have found is Bernstein "Diabetes Solutions". You don't have to take everything he says, but there is much of great value in his book to guide diabetes management. There is also Utube, Berstein Diabetes University, with 200+ seminars on various topics.