Low Carb net Carbs per day

My doctor suggested I take less carbs since I'm pre-diabetic. I tried to search online what is considered a low-carb intake and most of the answers were considered Keto. I tried Keto in the past and I found it too hard for me to follow through. I also saw 'Under 100-150g is considered low carb'. I just want to make sure it's net carbs and not just overall. Do you guys know the answer?