Sounds like they might want something where they have a low barrier of entry and where they can feel their impact immediately. Could you help your friend to look around for active mutual aid groups in their area? Otherwise Food not Bombs might also be an option, check if there is a group nearby and contact them.
You can download certain iso files directly from windows:
https://www.microsoft.com/en-us/software-download/
Edit: also cant you skip account creation and license key on every version? literally skipped those yesterday on an OEM preinstalled win 11