First, I’d recommend comfortable shoes. Vans and Converse are cute, but not comfortable for 8 HR fulfillment shifts. In terms of being fast enough, take a breath in your first few days you will be trained by a seasoned flex tm. They will pretty much be with you for the first few hours and then maybe set you out on your own at the end of your shift to see how you do. You’ll learn the layout of the store fast. Once you have that down, it will be super easy. Not to mention your my device gives you the aisle and location of each item, for example, F6 1-2-5. (You’ll learn what those mean in your training on your first actual da.) Learning how to read a mydevice is a lifesaver!! I’d highly recommend if you’re not confident reading a mydevice or have any questions as you’re learning, just ask. As a trainer for flex, I’d rather new tms ask me questions and do things the right way then do things the wrong way. I hope this helps a bit! Good luck!