Offering As A Secretary

This morning, Smart ( the company where I applied for position of Training&Recruitment) called me back and told me that they prefer me to fill the position of Secretary and due that offering, I must attend the Interview with the CEO tomorrow morning

Honestly, I am feeling afraid because I have no experience in that field, even they already known it before..

But its OK, my hubby said I better try and know rather that just guess and guess. As long as they want to work together hand-in-hand with me and let me learn first, I believe I can manage that field as soon..