Welcome Karl94, this document may be of help to get you going quickly
https://sysdfree.wordpress.com/266 it is like a FAQ for 66, not complete yet.
https://wiki.obarun.org/doku.php?id=66 for in depth study of 66 (same material that is on that software link on the menu above the forum.
I use the net-tools pkg that has ifconfig to check on network problems. (# indicates you are root, not user).
# ifconfig
will tell you what interfaces are up. Let's say eth0, or enp034s whatever it is called, is your wire connection interface. # ifconfig eth0 up will make the interface active.
# ifconfig lo down
# ifconfig eth0 down
# ifconfig lo up
# ifconfig eth0 up
this sequence will reset everything (adjust to wlan, or funky interface names you have).
# dhcpcd eth0
will configure the interface and make a connection if possible
# 66-enable -t root -S dhcpcd
will enable the dhcpcd daemon and start the service
# 66-info -T root
will tell you what services are enabled, active, started and logged by 66 for the tree named root which should be active by default after any installation flavor you tried.
You do have a 2019-05 iso, right?
Or did you convert an arch installation to obarun?