Erstellen einer Wordpress-Vorlage

Within a Wordpress based website, we need a functionality of an agenda with the following features: • Manage events: For example the social cooperative organizes an event (e.g., birthday parties, group meetings, etc.), provides information about events and invites elderly people to them. Users can express their informal approval for attending an event published on the platform or express that they do not attend the event or require more information about the event. • Manage appointment • Manage tasks • Manage Deadlines The attached diagram visualizes the workflow. The features should be available in the front end (not dashboard) for logged in users. We already identified the plugin "Calendarize it" as a possible base for these functions. But we are also open for other technologies/ suggestions.