Download the ESP32 package from espressif. This is a good tutorial for that:

https://randomnerdtutorials.com/installing-the-esp32-board-in-arduino-ide-windows-instructions/

I selected the ESP32 Dev Module as my board.

Make sure to select the correct port where your ESP32 is connected.

Run a quick light blink example to make sure that everything works. You can do so by running the code https://github.com/mahrukhtauseef/Intercom/blob/main/Blink_Example/Blink_Example.ino

For setting up the schematics, I used the pin labels on the back of the ESP-32 board.

Back side of the ESP32 with pin labels

This is how I setup the board:

Circuit Schematics

Circuit

Code in action

Code in action