Keep in mind it's possible to dual-boot. When I start my PC, I have a choice between Linux and Windows. Haven't booted into Windows in months as I haven't needed to.

Another option for those with faster PC's: Install Linux into a virtual machine (Virtualbox is free and available for Windows/Mac/Linux), so you can get a feel for what it's like until you are ready to install it directly onto your hardware. Try out different distributions until you find one you like!

Alternatively, you can install Virtualbox in Linux and then create a virtual Windows install you can start up if you have windows software you can't do without. Most people are able to find native replacements in Linux though.

There are loads of tutorials on Youtube that show you how to accomplish the above.

I have used Manjaro but prefer a pure Arch Linux install. There is a distro called EndeavorOS which is basically a nice installer for Arch Linux as Arch is a bit more involved to install. I do recommend trying a manual Arch installation at some point (even in Virtualbox) as you will learn a LOT about how Linux works and will be more comfortable with the command line. If you like to tinker, it is a fun project.

Once up an running, an Arch-based install updates daily to the latest OS and software all with one command. Unlike Windows, YOU decide when to update.. not the OS. There is a lot of support available online for Linux. You will likely run into issues at some point, but a simple duckduckgo search will often find a solution before you even have to ask on a forum.