You are very young. If you were diagnosed early, you can “save” beta cells by aggressive management of your blood glucose levels. I would suggest metformin XR initially - it has been on the market a long time, is proven safe & effective, & doesn’t cause hypos (lows.)
Diet & exercise are great & totally necessary with or without meds. Restricting highly refined & processed foods and carbs is essential. I just think that rather than add drugs only when your current regimen begins to fail means that you are stressing your body’s capacity by that time.
In my case, I was diagnosed 11 years ago at age 46 & started met 500 mg twice daily. Over the years, my dosage has increased. I also tried glipizide, but it produced severe lows that were unmanageable, & januvia, which had no effect whatsoever on me. I’ve been on lantus basal insulin for 15 months & have been taking prandin with lunch & dinner for one year to help manage post prandial spikes.
Good luck & keep us posted!