If you're taking her out fishing for the first time, just go somewhere that she can catch something. Don't go for big ones that are rare. Just make sure that where you go she catches a thing! The species is not important!!! Trout, bass, crappie,...
And make sure that there some birds around!

I don't know somewhere close to Salem, but Olalla reservoir (near Toledo) would be a good one for her this time of year.
My girlfriend and I went there yesterday and she loved it!