Oh dear. I remember my first Silent Realm all too much. I was terrified. I listened to everything Fi said carefully and was extremely cautious not to get caught in the light, but I kept running out of time and couldn't find the last couple tears. To make things worse, I did not know at first that you could easily get away from the Guardians simply by walking away from them. I thought they were fast enough to catch you, so I held A to sprint the whole time and always ran out of stamina, so then they'd catch me.
I actually failed so many times that Fi said, "Master, the chances of your not being the chosen hero are increasing..."
When I finally found the last tear, it was up on a cliff next to a vine-wall. The guardians were already after me, but I began climbing anyway. I was hyperventilating the whole time, certain that a Guardian was about to come up behind me while I couldn't see them and knock me off the cliff, but none did. I got the final tear and I'd never been more relieved in my life... until I had to go back to the portal.