Modify/Customize the following file:
/var/www/html/events/wp-content/plugins/events-calendar-pro/src/functions/template-tags/general.php

The following is not shown to the Contributor:
You have 4 RSVPs for this Event. View your RSVPs

Remove the color scheme picker
remove_action( 'admin_color_scheme_picker', 'admin_color_scheme_picker' );

Licenses and Development
https://theeventscalendar.com/knowledgebase/using-one-license-live-dev-sites/

Show users RSVP in frontend
living in the class /event-tickets/src/Tribe/Shortcodes/User_Event_Confirmation_List.php:

/**
* Provides a shortcode which generates a list of events that the current user
* has indicated they will attend. Works for all ticketing providers.
*
* Simple example (will assume the current user as the person of interest):
*
* [tribe-user-event-confirmations]
*
* Example specifying a user:
*
* [tribe-user-event-confirmations user="512"]
*
* Example specifying a limit to the number of events which should be returned:
*
* [tribe-user-event-confirmations limit="16"]
*/

Multiple Calendar
https://theeventscalendar.com/knowledgebase/can-you-have-multiple-calendars/

Community Events - Hide category from Submission Form
https://theeventscalendar.com/support/forums/topic/hide-category-from-submission-form-category-options/

Inserting Calendar Content into Posts or Pages
https://theeventscalendar.com/knowledgebase/inserting-calendar-content-posts-pages/#calendar-views

short codes
https://theeventscalendar.com/knowledgebase-tag/shortcodes/

Events Calendar Development Notes