Hi Yazhini, It may not work. The Arduino IDE requires the target board to have a bootloader so that you can flash the application from the IDE to the target board via UART (or USB-Virtual UART). I am not so familiar with the Arduino ecosystem so I don't know if the nRF52840DK board can be used for Arduino ecosystem or not but at least you have to flash a serial DFU that can communicate with the Arduino IDE. Please ask the question in Arduino forum. For example: https://forum.arduino.cc/t/bootloader-for-nrf52840-dk-using-arduino-ide/1176904
My suggestion is to take a look at our nRF Connect SDK. We have a Dev Academy here that can help you getting started: academy.nordicsemi.com/
