You would want to do a little homework. You would want to research your OS? options. What might work for me maybe deal breakers for you. All Linux OSes I found comes with a web browser, email client, and office suite. I will also look for an OS that would have integrated backup solutions. With that said, you would want to always back up your /home folder. This is where all of the personal files of everyone using this computer will be. Since most personal computers are tied to just one person, I could see a Personal Profile, and a Work Profile. If that is the case with you, then back up the entire home folder rather than just a single profile.
For web browsers, most distributions will use Mozilla Firefox for the web browser, although personally – I will prefer Brave Web Browser which should be easily installable on your Linux platform. For email clients, most distributions will offer Mozilla Thunderbird. When I last used this email client, I didn’t like how it behaved, so I stray away from that client. For office suites, LibreOffice will be on all but a handful of options. LibreOffice also has a MacOS, and Windows version. LibreOffice can handle most Office 365 files including .docx files from Microsoft Word. if you find that you need to communicate with people that uses MS Office files, you can make changes to LibreOffice’s settings to save in .docx format to make it easier for people to view your files. Keep in mind that Microsoft does not offer a Linux version of their office suite, so LibreOffice or the web version is your only options available.
There are also ARM versions, and x86 versions. If you have an AMD or Intel CPU in your computer, then you would be using the x86 version of the OS. Almost any other CPU, you would use ARM. This in important to note, so you would want to make sure you have the appropriate version.