First initial tweaks

hostname

hostname --set-hostname <hostname>

disable IPv6 stack

adjust GRUB timeoute

NTP client config

DNS resolver config

repositories check

Install additional utilities

zypper install \
    tmux \
    htop \
    ncdu \
    traceroute \
    tcpdump \
    

Install KDE GDE

zypper install -t pattern kde_plasma
zypper install -t pattern kde_plasma kde_apps
systemctl set-default graphical.target