If you bought your computer after 2010, there’s most likely no reason to throw it out. By just installing an up-to-date Linux operating system you can keep using it for years to come.
Installing an operating system may sound difficult, but you don’t have to do it alone. With any luck, there are people in your area ready to help!
It may, depending on what flavor of Linux you end up running. There are a lot of them and even the “better” ones are better at specific things. Some are great at running forever without ever needing to restart your computer, others might be better at handling the newest or oldest hardware out there.
So, yes, Linux is definitely good and stable enough to provide you the experience you expect from an OS, but it doesn’t mean that any Linux will be like that.
If you don’t want to deal with the command line, I recommend a distro from Ublue: Bluefin/Aurora for a general purpose OS, or Bazzite for something pre-configured with tools that improve support for games and windows apps.
UBlue distros are good at giving you something that just works and you won’t ever need to mess with the terminal or config files unless you’re trying to add more stuff to the OS, as opposed to just trying to tinker with what’s already there (in fact by default it doesn’t even let you modify a lot of config files that other distros might often suggest you do)