Hello,

1/ I have checked the page seems you use a plugin not our default coming soon page? If you use the plugin check their documentation if they have an option for that. You can find the default page in Pages > Coming soon page 2 and edit it. There is the counter element where you can set the time

2/ Navigate to MailChimp plugin settins and configure connection. http://prntscr.com/j2vwou

Best Regards