Is your kindle updated to the latest version? I jailbroke mine and now I use Koreader exclusively.

Why do you use transmission? Genuinely curious. The times I tried to use it, it seemed so basic and lacking functionality

Why Debian 12 specifically?

+1 for fedora here. In my experience, laptops don’t play great with Linux, but fedora has been very stable. Everything really “just works” on my laptop and it hasn’t been like that with other distros. It’s the only one I could actually recommend at this point.

There’s zonos, and I heard of another one called GPTsovit or something like that, but I haven’t tried that one. Zonos is pretty easy to setup and run though. Another one is Kokoro, search for Kokoro TTS to find it on google.