How can I send out newsletters from my Mailchimp?

How can I send out newsletters from my mailchimp list while it's integrated with jotform and wordpress?

You need to do this in Mailchimp. Here's a support document from Mailchimp: https://kb.mailchimp.com/lists/groups/send-to-groups-in-your-list.

I believe your form is embedded on a Wordpress page. Please take note that the form only transfers the data or values to MailChimp via the integration. Here's a guide: https://www.jotform.com/help/163-How-to-Integrate-with-MailChimp.

Hope that helps. Thank you.