What Should I Do If I Can't Practice?

My name is Su Buxiu. I don't know how to practice cultivation because my master was unwilling to teach me, so I ran down the mountain. But people outside said that I was born with a golden body and a Taoist soul, and that I was a peerless genius. Many people are vying to be my master. But here comes the problem... So many people want to teach me, but what should I do if I still can't practice? Some people said that maybe I could practice cultivation if I ate the grass guarded by the ancient dragon, so I caught the ancient dragon and put it into my fish pond. But I still can't practice cultivation after eating that grass!