I need your help pleeeease!!!
Having dressed up in anything more than nice leggings for 2 years, I am now facing the ultimate outfit challenge. Work lunch out at posh place!! 
I'm 2 months into a new job at an ad agency. The lunch is at a fancy Italian in London. There'll be 5 of us - three male, two female.
What to wear to project professional yet still sightly on-trend? And high heels or flats? And please talk to me about jackets?
Currently flipping between this:
www.newlook.com/row/womens/clothing/dresses/blue-leopard-print-puff-sleeve-belted-midi-dress/p/669788349
and this:
www.freepeople.com/uk/shop/pretty-dayz-set/?category=maxi-dresses&color=018&type=REGULAR&quantity=1&size=XS&fbclid=IwAR0nc6MLGoBRGdVwD06codtR6mquUFseP97egQ457OdUTNkaUqY-lRZca8U
Probably with heels (I'm petite, need them for confidence) and little leather jacket...
Any/all advice appreciated. I've been self-employed since 2008, so this is unfamiliar territory!!
Thank you!!!