..Continuing my installation process, I have now tried what is apparently a key test, which is wifi. I have followed the instructions here: https://www.youtube.com/watch?v=nasH0VLkqrY&t=225s and cross-referenced here: https://forums.freebsd.org/threads/failed-to-start-dhclient-wifi.75889/
dhclient fails to start.
I have now found this page: https://www.unix.com/bsd/259350-freebsd-dhcp-wpa_supplicant-wi-fi-issues.html
which may provide a solution, but remain wary of just typing in any old thing.
..still researching, but eyes tired. will resume later. ..interesting, tried to delete this so as to only post it if I can't figure it out, but not convinced it worked.