I broke my first website by deleting one line and learned git
When I was learning to build websites, I spent an entire weekend making a simple page that showed my campus timetable. I was so proud. Then I deleted one line of code by accident, saved the file, and the whole thing stopped working. I had no backup. Nothing. I had to start from scratch. That mistake taught me to use git, which is like a save button for your whole project. You take snapshots of your work, and if something breaks, you can go back to the last good version. It's free and runs on your own computer. Now I tell every beginner: the first thing to learn after hello world is git. You can practice by making a simple folder with a text file, typing git init in your terminal, and saving your first snapshot. It saves you hours of crying later, trust me.