Don't throw away your Kindle, Jailbreak it and take back ownership. Make your Kindle even better with KoReader and other apps.
If you wanna see whats possible i recomment this Yt video.
If you wanna get started here are all instructions:
https://kindlemodding.org/
Don't let it scare you it seems complicated but its just a lot of (easy) steps. So definitely possible in <2h.
I know calibre has some dedrm add-on that removes DRM with an anonymous adobe digital editions account. That might be able to do the DRM removing and converting without needing to install ADE
I know calibre has some dedrm add-on that removes DRM with an anonymous adobe digital editions account. That might be able to do the DRM removing and converting without needing to install ADE