I agree with DeafNerdMommy. I won't allow my hearing son to assist or interpret for me in any way. It's against the principle. I do not want him to feel like he has to work for me. If someone ignores me and talks to my son instead, I would pull someone aside and explain it that my son should not be an interpreter for me. He is a child, not an adult. Period.
My husband is hearing and I'm profoundly deaf. He knows ASL and Korean. If I sleep alone while my husband goes away on the business trip (my son is not a baby anymore), the monitor lets me know if my son cries. I had no problem. It went great. I wear hearing aids and can hear my baby cry. My husband and I teach our son ASL. He is provisional pre-verbal. ASL is his first language for now. It's all worth it. If you have a child with autism, I'd strongly recommend ASL. Very useful.
Yes, when you become a parent, you will deal with all kinds of "new" feelings. You will start to feel nervous and emotional, believe me! Those feelings will never go away ever again. You will love that child forever. As a parent, it is ok to make mistakes, but you will learn fast.