You're cute as anything and the dress is luuuuuuush
I would do the following:-
- wear your hair up for sure, that neckline wants to show off some pretty shoulders and neck uninterrupted by strands of hair.
- go for a "natural 'n glowy" face - just a bit of bronzer or peach shimmery blusher - use it to accent your collarbones and decollatage too, just a sprinkle of shimmer is beautiful
- DEFINITELY just something sheer, shimmery and lipglossy on the lips, with not much colour.
- I would have a look at Steamy (as someone's already suggested) and Shimmermoss Mac shadows and decide which one complements your frock best: they're both shimmery greens similar-ish to your dress fabric colour and I think just a touch of a shadow like that would look awesome. I think it's more "shimmermoss" from the look of the pic.... bear in mind you don't need an exact match, just something to complement... I also think these kind of colours would work well with your eyes.
- smudge the strong acqua colour over the lid just a very simple "zap" of shimmery colour, then add a little bit of something shimmery and perhaps slightly pinkish under your browbone as a highlight (Lighstcapade MSF, Crystal Avalanche, Seedy Pearl, Phloof! might be worth trying) and blend the edges of both colours really, really well. This should look shimmery, soft, and girlish but definitely "made up" because of the strong lid colour.
- Last thing to do is add the false lashes (I loooove false eyelashes but it takes me sooooo long to get 'em straight I rarely bother, lol!) then use just a little bit of black pencil or fluidline over the join to neaten and conceal.... make sure the eyeliner is really fine, you don't want a really obvious line here, the false lashes and the fresh shimmer acqua should be enough.
I'd also keep your jewellry simple. Some pearl or pearly coloured earrings would look pretty with this dress I think.
Hope this helps, Sho x