Add AVR Boards 1.8.3 and create a simple hello world project, set platform for Arduino Nano - ATMega328P - AVRISP mkII and finally compile and upload the project. You'll get the following output: ...

optimal would be if you could point to one of the arduino default bootloaders like so: ...

The Arduino ecosystem is an amazing learning tool, but even those of us who love it admit that even the simplified C Arduino ...