The documentation is the best in the field.
Basics:
https://en.wikipedia.org/wiki/OpenSUSE
https://www.opensuse.org/
Download:
https://software.opensuse.org/distributions/tumbleweed
Install instructions if you want to install yourself:
https://en.opensuse.org/Create_installation_USB_stick
(if hardware install)
https://doc.opensuse.org/documentation/leap/startup/html/book-startup/index.html
Documentation:
https://doc.opensuse.org/