Im thinking of trying a keto diet to help control my diabetes 
Thats good to hear. What exactly is a keto diet?
the ketogenic diet is a diet that consists of moderate amounts of protein and high amounts of fat and very low amounts of carbs
Thats interesting. How is a keto diet from the traditional diet?
The traditional american diet is very high carb, high fat, low protein.  
Oh ok. How did the keto diet get its name?
When doing the keto diet, you have an elevated level of ketones in your blood, puts you in a state known as ketosis, hence, the ketogenic diet.
Thats extremely interesting. Is there any suggested foods for this diet?
Any high quality protein sources, like chicken, beef, pork. Throw in some healthy oils for fat, like olive oil or avocado oil, nuts are good as well. Cheese. Butter. really a long list.