Here's the card I came up with which is for my niece's birthday at the end of the month.
I used a stamp from the Stampin' Up set Summer by the Sea and stamped it simply in sepia ink (Versafine) onto white card. I used my nesties to mat the image and used paper from the Hanoverian collection by Papermania (which is one of my paper collections) for the background. I think the brown card was part of a Stampin' Up set but I can't be sure! I found flowers, card candy, button and some ribbon in my stash and used a Stampin' Up scalloped oval punch to layer a Craftwork Card sentiment oval on.
As it's been a long time since I've used a sketch for a card design I've followed the sketch just about to the letter - experimentation will come in time!