Making Stuff Out of a Raspberry Pi 3A+

I recently got a raspberry pi (RPi) for Christmas this year. I was really happy about it as I wanted it for many years. First, I Installed the Raspberry Pi Desktop OS on it. But, I was limited to doing very basic tasks such as opening an offline app. So, I thought of installing retropie on it. Retropie turns your raspberry pi into a gaming machine. It could play games ranging from the Atari to the PS1. The controller I was using with it was the Shanwan Redgear Controller which is my main controller that I use for nearly playing every game. The audio and display was also very crisp because of the HDMI port on it. My father bought it from thingbits.in I also got a screen for the rpi 3a+ but unfortunately, it wasn't working. I'm also planning to use the raspberry pi as a media streaming device. How I turned it into a gaming machine? Well , to be honest it was quite simple actually. All I did was download the retropie buster image for my raspberry pi from this website: retropie.or...