In my experience, "dieticians" spew the outdated non-sense that the giant industries the AHA, ADA (diabetes, not dental but they're guilty too) and ACS take money and research from. My husband saw one a couple of years ago who was still preaching that margarine was better than butter, that "calorie free" beverages sweetened with Splenda and aspartame were good choices and that you get elevated cholesterol from eating high-cholesterol foods and that fat-free processed snacks are good for you. My MIL works for Coca-Cola, which is "Proud to Be a Partner" with the AHA's "Go Red for Women" campaign via the Diet Coke line. Never mind that heart disease is a disease of inflammation and that artificial sweeteners trigger an insulin response that contributes to inflammation. CC spends countless sums of money on "research" that supports the idea that their beverages DON'T contribute to obesity and associated health problems.
Anyway...our family sees a chiropractor who does nutrition counseling. She is all about whole foods, how real food is healing and restorative and how foods complement each other to promote optimal health. This is not covered by insurance, but your plan may be different and may cover some sessions.
Good for you for looking for help. There is a lot of bad information out there, and even the best information gets updated over time. It can be overwhelming, but just start with the basics and keep things simple. Focus on small changes one or two at a time and things become manageable.