Hi , welcome to healthcare magic, I am sorry that you are unwell

There are 2 main types of diabetes: type 1 and type 2 diabetes. Type 1 is mainly seen in children and occurs as a result of a total deficiency in insulin.
Type 2 is mostly seen in adults and is due to resistance to insulin which eventually leads the pancreas (insulin is produced here) to burn itself out and will , in most people, result in a need for insulin.

Diabetes is controlled by lifestyle changes and the use of appropiate medication.
Lifestyle changes that you would need to adopt include reducing your intake of refined carbohydrates- reduce intake of sweets, high sugar/high calories desserts, use brown flour ( in limited quantitiy) rather than white flour, use brown bread (in limited quantity) over white bread
Increase your intake of fruits (the ones that are not too sweet such as apples, watermelon - mangoes and bananas may have alot of sugar) and vegetables. When you are eating your meals , make the fruit or vegetables at least half of the plate , one portion of meat.
Reduce your use of any sodas or juices and increase your intake of water.

You should ask your doctor for a referral to a nutritionist to get detailed advice on what to eat and what to avoid.

In addition you can also try to increase your physical activity to reach at least 150 minutes of exercise per week.

Make sure that you take your medication and report any side effects to your doctor.
You may need to take insulin if the oral medication is not adequately controlling your blood sugar.
Most oral medications work to help your body's insulin get the job done , but as stated earlier, eventually insulin is needed because diabetes is a progressive disease.

I hope this information is helpful to you and I hope that your blood sugar comes under control