/n/kfs is the conventional mount point for the previous local-disk-backed file system on terminals and cpu servers; it's likely just an issue of point it at wherever your file system is *really* mounted, instead (or, just mount it on /n/kfs and skip the changes).
however, and this is important, it is *very* *strongly* recommended that you learn to use the system without X11 first. X11 is not part of the distribution for a reason; that port is old and slow, and was never heavily used. no program in Plan 9 depends on, or even wants, X11 in any way. you will find it distracting and frustrating rather than helpful if you aren't familiar with "real" Plan 9 first, as you'll keep expecting things to be there which aren't.
