Using the built-in Mailchimp is easy!
The Mailchimp widget is displayed either via drag & drop with Elementor, or through a native WordPress shortcode, the choice is yours!
To display the Mailchimp widget in a Page, simply drag the Mailchimp Widget onto the page if using Elementor, or, if you would prefer to use a native WordPress shortcode, simply switch the text editor in the page from Visual View to Text View, and click on the Mailchimp shortcode button to insert into the page.
To get your Mailchimp URL for the options. Simply login to your Mailchimp account, from the top menu, click Create > Signup Form.
In the Popup Modal, select Embedded form and click begin.
Configure the options you’d like, then in the Copy / Paste box below, grab the URL from the form action attribute. It will look like: https://yourlist.us3.list-manage.com/subscribe/post?u=7521a204b0376978s6d9sds879&id=1ea7hsdt646
Finally, whichever display option you’ve chosen, simply set the available options and you’re done!