@Everythingiswonderful oh but my post wasn't directed at you at all but at the OP, as a further encouragement to changing her diet.
As much as you introduce food that will make favourable species thrive, you also need to cut the food supply for the harmful one, and this means, eliminating ultra processed food and reducing the amount of meats if you are having it like many three times a day (eggs and bacons morning, chicken lunch and beef in evening), processed meat are especially bad for the gut.
It doesn't have to be veggies only. Rolled oats, cold pasta from the night before, ideally wholemeal.
It won't be an immediate process, but once the change is done, your taste buds will change because everybody forgets about the microbiome in the mouth, and they need feeding as well, so eat crunchy things, apples, celery, fennel (fennel and celery , but not together, are lovely with the juice of a freshly squeezed orange, Cut the celery or fennel as thinly as you can, sprinkle some salt, extra virgin olive oil, the orange juice, and a tiny bit of red wine vinegar) .
the problem with the veggies I see here in Australia, is that most people don't know what to do with them or how to cook them to make them delicious to the point you would prefer the vegetables over something else.
Garlic, fresh rosemary and olive oil is your friend for all oven roasted veggies.
Soup is often overlooked. Think the thick French onion soup, a true Christmas dinner for your gut bacteria, and so easy to make.