I have found Mailchimp really easy to work in. Everything is integrated, it will collect mails - it just works.

Look into it - or set up a call, if you want some tips on how to get started.

Focus on simple design and accessibility offers value, not sales increase user experience. I own luxury networks and have worked with similar sites. Your social rate is very small 6.43%
we could do a strategic plan and improve our business.

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.

Good question. Nice website, Moi Moi. While there are many choices available, first you might want to think about your offer. For example, you could add a customer testimonial on your form. And, test the "submit" button w/something more personal like, Yes, I love VIP offers.
As far as landing page builders, we use OptimizePress: http://www.optimizepress.com?fpr=rob33

They have a lot of attractive templates by industry and offers. They're customizable too. Here's one we did for a Free 5-day e-class on Webinar Marketing. https://www.robynlevin.com/online_marketing_services/free-5-day-class-learn-how-to-get-more-leads-customers-w-webinars/
Hope that helps you out!

HI
In order to make sustainable and high-quality improvement You have to do analysis of Your target audience, Your Landing Page Value Proposition, Commercial Terms, Competitive Analysis, UX/UI research, Call to Action analysis, Placement of buttons, Usability Study, Speed Assessment, SEO. And only after this job is done. You can understand what and how to be improved. In this case the result and conversion rate optimization would be guaranteed.