Hi Abhijeet! Eric from Mixpanel Support here. I’d follow these steps to get what you want in the report:
1.
I would select “All Events” in the query builder, and use the First Time Filter.
2.
Then, I would filter for the specific event name you want or just leave it blank if that does not matter
3.
If you are trying to see a group of people who did a certain event as their first event, I would click on the bar with that event name and “view users” to see the people who did that event as their first one.
Hope that helps!
How to Identify First Event in Mixpanel Analysis | Mixpanel Community