Unable to find arduino on device manager
It seems your computer recognize the serial port of the Arduino device, but doesn't know how to 'talk to it'.

In most USB to TTL devices (that are included in Arduino and ESP8266 boards) you need to install their driver (like CH341 driver) BEFORE you plug in your device.

Please try to find/identify the 'USB to Serial' chip you have on the board, and install its drivers.

Good Luck!