I am ready to wear my kilt to the office. I am a newbie.

I bought a Black Watch tartan wool kilt.
I bought lovat green hose and red flashes.
I also bought the family name kilt pin and a black rabbit fur sporran.

I do not have a kilt belt yet, so I am wondering if I can get away with wearing a normal thick leather belt with a normal buckle until I buy a more formal kilt belt. Or should I absolutely wait until a get a real kilt belt?

I did not buy anything for the top, so I was thinking of wearing a white dress shirt, black tie and black button up vest. But I was reading that white hose were a no-no, so I am wondering if it is OK to have a white dress shirt?

Or would it be best that I wear a black sweater?

Thank you for any advice. I am a little nervous since this is the first time since I bought it in December that I will be wearing it out.