Linux won’t give you much more privacy in your case. I would recommend storing and manipulating your personal data on a separate Linux machine and please don’t store anything except what’s absolutely necessary on OneDrive. Though if you can’t afford a separate machine, you can run Linux to get at least some improvement. I think the only DE that has good MS cloud support is the latest version of GNOME so you need a distro with that DE. It can be Ubuntu 24.04 (or something based on it) or a rolling release. The last one may be more difficult to use in some cases but idk any other somewhat user friendly options.