Can someone help dress me for tomorrow please?

[SantasNaughtySack]

Very last minute event and I'm struggling to strike the right balance.
I'm going to a business open day tomorrow afternoon, it's the pub trade so not officey.
There's no dress code, but I want to be professional looking but not too much so IYSWIM.
How do I create that kind of look? I'm quite literally rubbish at smart casual

Nobody? Leopard print onesie it is then

Not that I've got anything against the onesie but maybe a jumper dress with long boots would do the trick

That seems like a step in the right direction, thank Wishful