I decided to use the newest Raspberry Pi model as of today; the RPi-4B.

It can be powered via the USB-C port, and it uses a Micro-HDMI to output display.  You will also need an 8GB Micro SD Card (or 16 or 32; I chose a 16GB), and an SD Card Sleeve for it.

https://www.raspberrypi.org/downloads/

Download The firmware Raspbian onto your PC, download Installer onto your PC as well, then run Installer and choose Raspbian as the firmware and the Micro SD Card as the place to install its image. Your SD card is ready to be placed into your RPi and you can now run your RPi as a small computer; connect a usb keyboard and a usb mouse and a screen to it, turn it on; the user interface looks like any Windows PC.

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NOTE: If you buy a Pi4-B make sure you also buy or have:

HDMI- Micro-HDMI Chord

USB-C power & chord with 5 volts and 3.1 amps

Gen 10, micro SD card  & SD Sleeve

You will need a USB Keyboard and a USB Mouse later to use the Pi