Hey guys, a bit conflicted here. I got my very first job in May, and it’s at a popular drugstore. My manager told me today that they want to promote me to supervisor. I’d have to go through another interview process and I don’t know that I’m going to accept the offer right now. 
I’m so grateful for this opportunity but I don’t know that I’d be the best fit as I’m so new to the workforce world. I don’t know all of the policies. I don’t have the answer to everything. I (F) just turned 22 last month and I know this is an amazing opportunity, but I don’t think I’d be good for it yet. 

My coworkers (cashiers) who have been working here for far longer than me are not being considered. 
Reasons being and this is from my manager 
“One has no personality, another is too irresponsible, one is too young” 

I don’t know that I’m ready to do this, but they like to promote within the store and I don’t want to disappoint anyone. One of our supervisors is potentially leaving to pursue another career path, and I don’t know if they’re just trying to fill empty spaces now.