Ideally if you can, try not to eat too late in the day (like 10 PM). Better if you can cut off earlier around 8. The reason for this is because eating late at night before bed disrupts your circadian rhythm

Fasting is a great cure for type 2 diabetes. You should check out Jason Fung's books on it if you're looking for a looking for more info on it.

Outside of that, you're doing it right and the result show. Low carb is the best way to keep stable blood sugar levels. Water + coffee means no empty calories and helps we satiety.

You're making the best choice you can for your health!, I'm looking forward to seeing your success.