I was planning on doing a similar thing but my wife didn't seem terribly enthused by the current SOTA with Finnish text generation. Sometimes I do ask GPT-4 to "kerro minulle jotain kiinostavaa [aiheesta]" and throw the generated longform text into a single Anki card to read later on. The style definitely feels different, and it hallucinates a lot, but hey, it's still net beneficial on the margin.
Let's keep in touch, it's always good to meet fellow Finnward folk. My email is in my bio if you ever need anything.
I'm pretty happy with translation, even with GPT-3.5. I haven't used it for native text generation. Happy to keep in touch :D.