Adding a calendar booking and payment on site

Good day,

Created a website, something between a social network and online learning. Website on the topic and the platform buddyboss wordpress.
You need to add the booking calendar and payment for each user, calendar is needed for a particular role that a user can manage them from the frontend of the site without access to admin panel and administrator rights.
Examples of websites with a calendar: https://preply.com/ru/ and https://www.italki.com/