openSUSE is now fully installed and configured. Unless you enabled the automatic login function or customized the default runlevel, you should see the graphical login on your screen in which to enter a username and password to log in to the system. On single user systems with automatic login enabled, the desktop starts automatically.
For a short introduction to the KDE or GNOME desktop environments, refer to KDE Quick Start and GNOME Quick Start. Find detailed information about both desktop environments and about the applications to run on KDE or GNOME in KDE User Guide and GNOME User Guide.