Which microcontroller to choose for a USB device with a button and a digital screen?

Question

Microcontrollers

I want to make a timer device from a button, an LED and a screen to display the time.
You also need to connect it via USB to your computer to send a press signal (keyboard mode is fine, as I understand it, it can send a hotkey there). USB is desirable "out of the box", either at the device level, or the availability of ready-made lib / modules.
I think that you can take an arduino or even a pi, but it looks like an overkill.
Googling gives a million options of varying degrees of hardcore, among which it is difficult for a person who is not in the subject to choose. It's possible that I don't know how to google properly.

Answer 1

For USB there is HID. For arduino there are ready-made libraries.
https://cxem.net/arduino/arduino231.php

Answer 2

STM32F103 aka Blue Pill will suffice.