Blimey...job interview! Help!

[Badvoc123]

I have a job interview next week (it will be my first in 7 years and I have been a sahm since then)
Can I ask advice about what to wear?
I have 2 options...

1. Dark purple smart knee length skater skirt with opaque tights and small heel knee length boots wi a black top and cardi?
2. Grey knee length military style dress with same tights and boots?

Help! It's a pt receptionist job in a secondary school... Thanks!

Flats definitely - slingbacks look weird with tights

That's what I thought...