My situation was worse than yours OP. My blood sugars were far higher, my bmi was 24, I didn't eat a particularly high carb diet and I'm 57.
I now have my sugars in the normal range and one more good reading in a few months time and I'll have the diabetic marker removed from my health file. No metformin.
At your stage you don't need to panic. You need to make changes.
Ditch the added sugar. Establish if your body tolerates stevia based sweeteners and you can use that in your tea or to make biscuits with for sweet treats.
You need to replace your carbs with other things or at least have better carbs. Instead of a full bowl of pasta I now have 30g of whole wheat pasta, instead of white rice, I now have a small amount of brown rice. Add in extra veg such as brocolli and cabbage.
I still have a little bread but again, choose a small amount of a whole wheat option.
Soups I make my own. I even have lentil. It has carbs but again they are better carbs.
I've learned to enjoy 90% dark chocolate and have a couple of squares of that.
Berries (I get frozen) in full fat Greek yoghurt are good for dessert or breakfast.
Eggs are your friends.
I eat apples but will usually have half a granny Smith with peanut butter. Having fats with your carbs helps slow the absorbtion and stop blood sugar spikes.
I can also have a small baked potato without effect. I have it with butter, cheese, tuna mayo or prawn cocktail.
And the other thing is exercise. Doesn't have to be intense, just getting in some steps is good.
This is not a life sentence OP. You just need to follow a sensible lower carb diet and I'm sure you will get your levels where they need to be.
Good luck.