Due to HID-Project library does not work with an UNO r3, I ordered a Pro Micro 5V. I am currently trying to find some drivers to work with the thing, but they might not be needed.
In device manager, the board shows as "USB Serial Device", but when plugging it in for the first time, Windows10 64x said that it was an Arduino Leonardo, and so does Arduino IDE 1.8.15. The best guide I could find is seriously out of date.
What should I do?
The Pro Micro is a smaller version of the Arduino Leonardo.
Select "Leonardo" in the Arduino IDE and you can use all the pins of the Pro Micro.
Many things can be added via the I2C bus.