You will love being an aunt, I became an aunt when I was only 17 years old and then again 18 months later when my sister had her second child. The only thing i Knew then was what I knew from babysitting from the time I was 12. Don't be nervous, The only advice I have for you is you will learn as you watch your niece or nephew grow up. And in my opinion as it was for me, being an aunt just comes naturally. :) Those instincts will kick in. And hey whose to say you haven't already been an aunt to some children without even knowing it? You may already be an aunt by choice :)