So does this means that if Arduino Micro is connected to nRF52 MCU then there is no way to start communication between nRF chip and Arduino Micro (with either SPI or TWI)
Using SPI or TWI you can easily communicate between different microcontrollers or sensors which support this. Please have a look at the nRF52 SDK SPI examples e.g. SPI Master Example. One device should be configured as master and the other device should be configured as a slave. For more information on SPI in general, please see this tutorial.
