Setting MailChimp API:

Go to Dashboard >> MailChimp For WP >> MailChimp
>>
Setting your API Key then clickSave Changes“. To
learn how to get API key, you can refer document of
MailChimp.

mailchimp

Create MailChimp Form:

Go to Dashboard >> MailChimp For WP >> MailChimp
>> Forms:

mailchimp-form

Demo Hotel WordPress theme has a style MailChimp form available, just copy and paste below content into
your MailChimp form: