First day at work in Sainsbury's tomorrow - help?

Hiya! Tomorrow I have my first ever shift at Sainsbury's (7am-3pm). But I'm a bit nervous as I am not sure of a few things.

We weren't really told anything specific about the lockers at out induction, so once I come to work and get ready where do I go to get a locker so that I can leave my stuff there? I know each store differs but just roughly where do you think I'll find someone who will help me?

Now, I'm working in the Cafe. So, once I sort out the locker and clock in where do I go? Do I just go to my department - the cafe - tell them it's my first day and they'll know who to get?

Sorry if these questions seem dumb to you but when you are a complete newbie everything freaks you out, really. I'll appreciate any helpful reply.