I took a look at your site, here are a few suggestions:
-the pop up that loads as soon as the site does is overwhelming and it is not likely that a customer will want to join your mailing list before they even get a chance to check out the content on the home page.
-The form in the pop up is asking for too much information. At this stage, I'd only ask for an email address and *maybe* a first name.
-You have a lot of beautiful, sparkly things, but I think there is too much on your homepage. You don't have to give the visitor everything all at once. Focus your home page by connecting what MoiMoi is, why it's different from other retailers and most importantly, why you connect with them.
-From there, I'd focus on trying to get them to engage so that you can find out what they are looking for. Someone else in this thread mentioned keeping it simple - I agree - you don't need to sell everything at once.

Overall, the most important thing to remember is to try and test your results.