There's a surefire way to tell is you're eating right for your diabetes.
Test, test, test.
Using https://www.diabetesforum.com/diabetes-treatment/78730-eat-your-meter-testing-method.html
Once you determine that a food is "good" or "bad" you can avoid the bad ones and base your menus on the good ones.
Re: a dietitian - I'm not sure you'll benefit a lot from one. Usually they recommend way more carbs than most diabetics can safely eat, allow a higher BG level than is actually safe, and couple their poor advice with medications to compensate.
A good read through www.bloodsugar101.com will educate you well beyond most dietitians, and even some doctors.
