Just to add to the good advice already given…
Is the fear of Linux the fear of the new, or the result of previous experience? I have used Linux exclusively for >25 years. In that time, Widoesn’t has morphed from XP to 11 – it’s completely different, and scares the hell out of me – unashamed fear of the new, at each version change. However, the more user-friendly flavours of Linux have grown up to be well-behaved adults, which just work, are simple to install, and offer intuitive user interfaces, quite different from later Windoesn’t versions, but easy to learn, and without the need to type arcane stuff into the ‘terminal’. So, ignore previous bad experience.
As others have said, you can try Linux by booting the PC from a USB stick or a DVD. Doing that doesn’t damage the computer, doesn’t install anything, and lets you access anything on the machine – useful for rescuing a box on which Windoesn’t caused a snafu. The appropriate version will also run on old PCs that are incapable of running the latest incarnation of bloated Windoesn’t.
Of the many available versions, MX Linux and Linux Mint are well-behaved, with good support, and are available in versions to suit almost any likely hardware.
Linux is free, updates frequently, quickly, and without drama, is relatively secure, and offers a wealth of free software, installable by a few mouse-clicks. Also, many Windoesn’t applications can be made to run under Linux. There’s no need to be afraid, and there’s no real need to be a Microsnot prisoner any longer.