There should be a ramp like rock stand on it and press O to examen it and put in your offering.

What you have to do is talk to the man who is always cutting wood, over by the little forest enterence where you learned the bloom technique. He will either tell you to come back later or throw a vase at you. Go near one of those worn statues with it(bite on it to carry) and Vala! Instaed Praise points