Are you planning to relocate after you finish your degree & certification, or what?? I completed a psych CNS program many years ago and returned home only to find that nobody in my area was familiar with or interested in hiring psych CNSs -- something I hadn't really paid attention to before I went to grad school ...

I found a teaching position (nursing) right away, through some personal connections I already had, but spent a
very long, discouraging time looking for a clinical position, until I just
happened to run across a clinic director who had moved to my area from somewhere else and was accustomed to psych CNSs and what they could do (
he couldn't believe his good fortune that there was a child psych CNS sitting around looking for a job, who hadn't been snapped up long ago by someone else -- go figure!) I've
done the "lone crusader trying to change the attitudes of all the healthcare employers in the area" thing, and, not only is it v. lonely and tedious slog (
and it don't pay well, either!!), but the chances of your being successful by yourself are not great.
I'm
definitely not trying to discourage you from following your dream, but I think it's important to be aware of
all that you're getting into, not just how you're going to find a preceptor for your education. If there aren't any working CNSs in your field nearby to serve as preceptors for you,
that's important info to pay attention to in terms of your future employment possibilities ...
Best wishes --