I kinda started programming back in the day, by breaking 2 school servers using a simple batch "virus"... it effectively opened tons of porn videos, threw the mouse cursor to the top right corner of the screen and shut down the PC after 15 seconds.
I masked the file and made sure it looked like internet explorer (since my school, back in the day, didn't use chrome and didn't allow the installation of chrome)
It was meant to troll my friend but all computers shared files with each other which meant even the private PC's of my teachers got my "virus"
Eventually it landed in the startup folder and messed everything up. I got snitched out, and I had to fix it
(I literally just wrote another batch file to delete my so called virus... because of the 15 seconds time limit I had)