I tried to get the event from Google Calendar of the specific date

function testing(){

var cal = CalendarApp.getCalendarById('moses@gmail.com');
var events = cal.getEvents(new Date("7/11/2022 07:30 AM"),new Date("7/12/2022 10:00 AM"));
for (var i=0;i<events.length;i++){
var title = events[i].getTitle();
var start_time = events[i].getStartTime();
var end_time = events[i].getEndTime();
}}

But I don't know how to get the same detail from Calendar when I schedule any meeting without specifying any date range.

My request is, I need to get the Title, Organizer Name, Start and End Time of the meeting when I schedule any meeting in Google Calendar.

Moment I press Save in the Calendar, My script needs to trigger and get the details of the meeting I scheduled in calendar.