Hello Lisa,
If you are a beginner, I would look for an easy play
beginners book with songs that you know. If you look in
a music store, try to find one with the melody line and
the chords above them. I would also do a google search
for piano chords. There used to be a free newsletter called
39 chords or something like that by Duane Shinn. Use google to
find it, then you can learn your chords for free.
Also, if you are looking for sheet music, I would look for easy
music with the melody words and the chords above it.
Piano music has 2 staffs, a treble cleff,(melody notes, right hand),
and a bass cleff, (base notes or chords, left hand).
It is also good to learn to read notes from both cleffs.
Do a google search for piano note reading and you should
be able to find some help.(I don't know if you read both cleffs
when you play the flute.)
I hope this helps.
Start off slow and easy and with songs that you already
know, it will go a lot smoother.
http://jmjlinux.110mb.com/piano_links1.html