After completion of theme installation process at the top of the WordPress admin panel you should get a notice with the list of required and recommended plugins.

List of required plugins:

• DymixTheme Extensions – Extensions created for easier handling of the template
• Elementor Page Builder – Visual Page Builder
• One Click Demo Import – Plugin for import demo content

List of recommended plugin:

• Contact Form 7 -Plugin for easy create contact form
• MC4WP: Mailchimp for WordPress – Plugin to integrate your WordPress site with Mailchimp
• Classic Editor – Enables the WordPress classic editor (and the old-style Edit Post screen with TinyMCE, Meta Boxes, etc.)
• WP Instant Feeds – Widget for Instagram