First of all, don't panic! There are many resources and support groups out there like this one.

Knowledge is power - get a copy of your blood and urine labs. You want to know your HbA1c - this is a 90 day or so average of your blood glucose. It will give you an idea of how much change you need to make to get it reduced.
A urine test will determine if you have protein in your urine, which is a marker for kidney health and artherosclerosis (heart and kidney troubles go with long term diabetes).

Get a blood monitor. There are some very affordable models on amazon. The meters are all cheap, what you need to compare are the cost of strips. You'll be checking 2-3 times a day, especially at first. Some meters are for techy types and have bluetooth connections to your smart phone, others are simple meters. Whatever you are comfortable with.

Set up an appointment with an endocrinologist at least 2 a year and demand full blood / urine panels. Knowledge is power. Set up an appointment with a dietitian. Having a dedicated team of doctors will help you.

The dietitian may suggest a low fat, low calorie, high carb diet. There are two camps on the best diet for diabetics. I'm not going to choose for you but I had the most success for the longest part of my life doing low carb or keto type diet. This type of diet can be tough for some, however. The fact is that ALL carbs convert to sugar in your body - rice, pasta, bread, corn, oatmeal, cake, fries, mashed potatoes - all carbs. You will find it easier to reduce blood glucose levels when you eat less carbohydrates. Having bloodwork done also lets you know if you have high cholestrol, liver issues or anything else that can influence your diet. If you stick to the lowfat/high carb diet, be sure to pick whole, high fiber, un/low processed choices in smaller amounts.

If you really want to revolutionize your eating - check out Dr. Berg and Flav City on youtube. Getting seed oils out of your diet (vegetable oil, canola oil, soybean oil, etc) will reduce inflammation but this is not the first priority now. Diet and exercise can stave off meds for many people, but don't fear meds if doctors feel you need them.

Walk - the simplest effort burns calories - in the form of sugar in your bloodstream. So walk every day. If you can't walk, ride an exercise bike. Move a bit - doesn't have to be aerobic workout. Walking a mile or so may do wonders for your glucose levels 1 hour post meal.

Ask questions. Ask here, ask your doctor.