:- Welcome to Linux.org!
I have to be unusual amongst "switchers". I kicked Windows out of my life at the end-of-life for XP, and dived head-first into the Linux sea. Sink or swim!
I would, however, echo some of the other posters. Whether you choose to dual-boot, or whether you choose to install Linux to a separate machine - which is not a bad idea! - it's probably best if you keep Windows around for at least the forseeable future. Give yourself time to get used to how Linux does things; there ARE considerable differences, and there WILL be a "learning-curve".......but it's not insurmountable.
Linux distributions have gone out of their way to make Linux usage as user-friendly & painless as possible in recent years. Many Linux users never go anywhere near the 'big, scary terminal', but it will always be there, since it's by far and away the most direct & powerful way of communicating with the system.
The days of having to do everything in the terminal, and to compile & build all your own software are a dim, distant memory, since most "distros" now have some variation on the Windows, Google or Apple 'stores' for easy installation of software. More & more apps & software are/is being ported natively to Linux. We've a long way to go, but it IS recognition from software vendors that Linux IS a 'player' on the scene.
It's a challenging, but ultimately rewarding journey, which will end up with you having a system you can truly make your own.