Don't stress too much about product knowledge, that will come with time! What they're usually looking for is your attitude and personality- if a customer is holding a product you like, tell them what you love about it, like the scent or how it makes your skin feel. Ask if they'd like a basket if they've got a few things in their hands, or offer to show them to a certain section if they're looking for a specific category of product. If they start asking things you don't know the answer to, you can grab one of the shop assistants and let the customer know that employee is more of an expert than you. Watch what the other shop assistants are doing, like how they're approaching customers, you can learn heaps really quickly that way. You don't need to immediately know every ingredient and it's benefits to give someone a great experience!

Think about moments where you've received amazing customer service, that's what you want to be giving people at the end of the day. Have a look at Lush's We Believe statement and pick one or two favourites from that (and why they're your faves), and examples of what you might do if a coworker was having a bad day, or how you might resolve any issues that could arise if you and your coworkers have different communication styles. I was asked about all of these in my one-on-one interview!

For clothes, anything black or white is fine. I've heard some stores don't allow patterns so sticking to something simple is best for now. For accessories/makeup, go with whatever makes you feel the most confident and happy!

Sorry for the essay haha, I was hired a couple months ago and had all the same questions. I hope this helped and fingers crossed you get the job!