Budding

 You can think of contemplation and how it works by imagining a flower that is still in its bud.  On the outside, all you see is the bud, but inside the bud the flower is growing, maturing.  You just cannot see it yet.  In time, when the flower is ready, the bud will open up and the flower will bloom for all to see.  So, just keep practicing.  If nothing seems to be changing within you, give it time.  The prayer is at work, but not in a way that is noticeable by you.  Patience.  You are not in control of results, but you are in control of showing up for the prayer.  This is how you water the plant of your heart.