Love the dress OP.
I'd steer clear of bright coloured accessories given that there's so much going on in the bodice. Think gold would be spot on for the bag and would tie in nicely with your bag. Same for jewellery, gold would be perfect. Earrings if wearing hair up, necklace if not. I would keep the jewellery fairly low-key.
There are loads of affordable gold/metallic shoes in ASOS, just had a quick search.