As I'm not into drafting my own patterns, I tried to find similar style dress patterns and I've found two that I have already ordered. One is a bridal pattern from Butterick (B5325)
and the other one from Kwik Sew (K3400).
My dress will have little straps because otherwise I would be constantly worried that it is going to slip down (I only tried to wear a strapless dress once and it was a nightmare.). I'm planning to use some rose colored tulle/ chiffon and satin which I hope will enable me to wear the dress afterwards as well :)
As for the flowers, I had a quick look on ebay, but couldn't find what I was looking for. Most flowers are white and I would like to use pastel colored ones (rose, purple, yellow, green). I guess I could cut these flowers from actual lace.
I haven't bought any fabric yet as this will have to wait until I have started with the muslin and to see how much fabric (plus extra) I need. I'm also not sure how many layers of tulle I would have to use. The inspiration dress seems to have two layers. I'm getting rather excited :)