Back in 2014 I was defending my thesis: 'Peculiarities in translation of medical terminology', and I was the only one out of about 35 graduates who got 'D' for it :) Nevertheless, I am interpreting now for 7 years. Sometimes stuttering occurs, but nothing serious. My little advice is to make proper presentation and use most phrases from it when performing; also imagine you are alone. You have time to prepare, and you'll do it flawlessly! Oh, there is a whole course. Practice makes perfect and good luck!