Just add a new partition and dual boot, it is pretty easy.
Also I do not recommend Mint for Windows users, because the officially supported UX layers are more apple-esque. Use a distro that has KDE support baked in. Adding KDE to Mint is easy but may not be for people switching.
For that reason, I recommend going with distros with KDE Plasma by default. Kubuntu or KDE neon.
Why KDE? It feels like where Windows should have gone. It’s like the glory days of Windows (windows 2000, etc) in the modern age. It is a drastic upgrade from Windows with more freedom than you ever had.
Dazed_Confused@lemmy.world 3 weeks ago
You can get a cheap ssd and install linux on it. Before installing disconect existing windows drive. After install reconnect windows drive and make sure that windows boots. Then boot to bios and choose linux as default drive and after booting to mint desktop update grub to include windows. On each boot you will be able to choose which OS you want.