Linux is pretty good too.
Most of the internet runs off of Linux or a derivative.
Android is a derivative of Linux. MacOS is a derivative of Unix, the predecessor of Linux.
Windows is the oddball. But now they're moving towards Linux with WSL (windows subsystem for linux) and docker and such.
Linux is open source and free as in speech.
You can try any of them without erasing your hard drive by using a "live cd" version, just write it to a USB stick and boot from it.
For example, debian (the one I use):
Debian -- Live install images
Comes with everything you'd want including web browsing, email, productivity (documents, spreadsheets, presentation, database, etc), video editing, audio editing, etc. etc. either on the base image or a free install from the app store.
You can run Windows, Android, MacOS and other stuff on it with KVM/QEMU in a virtual environment. I've got Windows 10 and MacOS in virtual machines on top of my Debian Linux.
Lots of Linux distributions are based on Debian. Here's one that's pretty user friendly:
Download LMDE 6 - Linux Mint