Low sodium seasoning/alchemy?

I'm on a severely restricted low-sodium diet (2300 mg/day, which [for comparison] I've learned is about the same as a teaspoon). I'm also trying to watch sugars, cholesterol, saturated fat, and so on. (Essentially keeping things below the 2,000 calorie RDA numbers.)

I'm trying to teach myself how to cook and season using spices, but it's slow going.

The hardest part is figuring out how to season using spices so that things aren't horribly bland, especially since I can no longer use the old standards: salt, butter, oil, cheese, milk, etc.

Does anyone have any tricks/links for making tasty low/no sodium, low fat/sugar food with minimal effort? And, by tasty, I mean flavors along the lines of traditional comfort foods, such as casseroles, pasta, stews, etc? (I've been using pepper, onion power, and garlic powder, but that's starting to get old.) Not vegan, per se, but minimal meats.

(And, I'm sorry, but nutritional yeast tastes nothing like cheese. Who's idea was that?)

Thanks in advance...

Hi