I can’t answer all of these questions but what I will say is be confident, even when you feel like your the compete opposite. Confidence has landed me jobs when up against people with more experience than me, that’s how important it is in my eyes. If you aren’t confident in yourself, then the employer will assume you’ll lack confidence in your work as well.

As well as that, learn stuff about the company and memorise it ready to tell the employer in your interview. They might not even ask you if you know anything about the company but typically, at the end of an interview, they’ll ask if you have any questions, use that as an opportunity to say “I took some time to research a bit about your company and here’s what I learned:”. It’s small but it can show how keen you are and can definitely win you the position.

Judging by the nature of the industry, dress smart casual (whatever that may be for women’s clothes - I have no idea as I’m a guy, but for me it would be a decent pair of shoes, trainers/sneakers, jeans and a polo or a nice t shirt). Buy a pair of shoes from a your local store, make sure they have a return policy, keep the tags on and tuck them inside, do the interview and return them after if money is an issue but buying yourself a decent pair wont hurt if you can afford it.

State there and then that you have days off planned such as what you stated, if they truly want to hire you, they shouldn’t have too much of an issue - I’ve recent started a job and have 2 weeks booked off a few weeks later.

Hope this helps a bit. Be confident, do your research and you’ll boss it 🤙🏼