Getting more subscribers on our website

Hi all,

I am part of an events company in South Africa called Lets Go Big Tunes we have been going now for just over 8 months. We have just started delving into e-mail marketing, everything is set up through our website and mail chimp but it is going exteremely slowly getting people to sign up. Is this normal? We are also thinking of starting to concentrate more on weddings this year any advise out there is apreciated