Newbie here

So today I went for three job interviews for three different positions in the same agency. I'm a recent university graduate. I feel like I completely bombed the interview. One question had two parts; what is your knowledge of the position and what is your experience? Me being forgetful and extremely nervous, I forgot to answer the experience part. The most important part. I feel like a dumbass. They didn't even ask to discuss my experience. Please help a fresh graduate ace the next interview I have, I'm feeling pretty discouraged 😓