^dress the part, be good at customer service, research the history of h&m to impress them, have a great personality (don't be boring!), just be genuinely excited to work there and how you could be part of a great team
They do! There's a size 8 option on the website. They never had 8s before did they? And I usually had to get a size 40 even though I'm usually a 39 but today I bought these in a 40 (only ones in the whole shop- I actually took them from a display shh) and they're a bit too big so I think you'd be fine with an 8!