Hot Topic Employees?

I just got hired today as a sales associate and I m really nervous. I really don t have a lot of experience in a store setting. I ve worked at Sonic and I worked at Walmart for two days. In the restaurant it seems like there s a lot of stuff to be doing all the time, and technically the whole crew was isolated from the customers and since I was a manager, I never really had to deal with anyone except for the crew and an occasional person or two complaining about food or asking where the bathroom was. Like how many people usually work on a shift, am I going to have to be doing everything or is there like one person for one specific role? Also how many hours do you usually work a week? What it training like? Anyone who used to work there offering anything would help me out. Thanks everybody!