Hello biz world!

I am starting my used children's clothing boutique and I need advice! I have done extensive research of this type of industry, I have accumulated some inventory, and I am taking business plan building classes in November. But I would like to talk to someone who either owns a used clothing store or knows about the industry. I would like to know the day to day tasks of a used clothing store, and what I should expect as far as sales go (I know that's subjective, but I need a ballpark number). Unfortunately, i i work full time so working at a used clothing store is out of the question. I understand that this may be the best way to acquire the know how. But it isn't an option for me. Please if anyone has any advice to share please feel free to share!