If usability is what you're looking for, your alternatives are MacOS, or some form of Linux.
From my perspective, the Linux distro called ElementaryOS[1] is the best blend of beautiful out of the box, accessible and usable, and not littered with ads, spyware, or other user-hostile antifeatures.
For other options, many many people do well with MacOS, and so it may be a fine choice.
A higher end Chromebook running ChomeOS might possibly be a choice, if the software you need will run there.
Aside from that your options are few. HaikuOS[2] might someday be a viable option but realistically is not there yet. ReactOS[3] might be something to consider if Windows familiarity would be a plus.
Haiku made my 2 GB netbook usable as a desktop, and it was very simple to operate for office tasks, and this was a year ago. Just intuitively I would guess that by Windows 10 EOL in October 2025 it will be a very reasonable choice.
From my perspective, the Linux distro called ElementaryOS[1] is the best blend of beautiful out of the box, accessible and usable, and not littered with ads, spyware, or other user-hostile antifeatures.
For other options, many many people do well with MacOS, and so it may be a fine choice.
A higher end Chromebook running ChomeOS might possibly be a choice, if the software you need will run there.
Aside from that your options are few. HaikuOS[2] might someday be a viable option but realistically is not there yet. ReactOS[3] might be something to consider if Windows familiarity would be a plus.
[1]: https://elementary.io
[2]: https://haiku-os.org
[3]: https://reactos.org