Welcome on board, you should think yourself very lucky. Prediabetes is the advanced warning that diabetes IS on it's way IF you don't do something about it.
It should be relatively simple to tweak your diet, and head it off. If you can give us an idea of what you normally eat, we can make suggestions as to how to improve the situation. (HINT what you believe is healthy, probably isn't with sugar dis-regulation issues). But don't worry, between us all here we have a wealth of learned knowledge. Learned by experience of living with diabetes.