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