Diabetes is a chronic, progressive disease. It only gets worse.
That said, you can do a lot to slow the onset of more serious symptoms and complications. Diet & exercise are key. John recommends real food in small quantities, others go ultra-low carb.
Diets are rarely effective if they force too much change too fast. At age 50, with the early warning you got, you could live well & symptom-less for years - well into those 'advanced' years.
Start reading food labels and recognizing where the carbs are coming from. Work to minimize those. Eat smaller portions with high carbs. Find low carb substitutes for those things you consume in excess. Go slow & have a goal of healthier eating. Make sure the doc does that A1c regularly.