Hmm. I don't know how often to feed her, but I assume your goal is to wean her off your supportive feeding and onto foods she can eat on her own. Maybe you can eventually persuade her to eat the porridge on her own? At the very least, if you can teach her to eat the hulled seeds on her own, with some small crumbles added in, or a powdered vitamin supplement added, that would make it easier on you. I imagine it will take some time and imagination on your part...
I was never under the impression that you were at fault or that you were "shirking" your responsibility. Accidents happen. And as far as vet visits go, there have been times when I've had serious issues but no good/experienced vet to access, and have opted to home-treat using my own skills and the skills/experiences of others. My worst outcomes have come from trusting vets when my gut told me not to... Exotic animals can fare poorly in the hands of a totally inexperienced vet. And besides, what is the point of further castigating someone when they're doing all they can? Some of the posts were harsh - I'm glad you were able to ignore the negativity and glean some ideas.