If you have not yet seen the "Ani Tefillah" Siddur (edited by Rabbi Dr. Jay Goldmintz, published by Koren) I would suggest starting there. I haven't used it myself but I know it incorporates a lot of reflective exercises in the commentary and may be a helpful text for you to use in this setting.
B'hatzlacha!
-Chava Lerner
Ma'ayanot Yeshiva High School for Girls