Mailchimp integration and newsletter design

This is about my online jewelry store, Miss Flurrty. We're currently hosted on Shopify and use Mailchimp as our Email Campaign Marketing. I'm looking for an expert who has experience working on Shopify as well as Mailchimp and in designing newsletters. Here is what I am looking for: - email sign up pop up box on my website:[login to view URL] - customer notification email - each time a customer places an order or cancels an order they receive an automatic email. We are looking to customize that email - we use mail chimp to send marketing newsletters to customers - we are looking to customize these templates. maybe 2-3 designs