Ah, I just noticed your reply now! I’d say Mint’s about as easy to install as the other major installations. If you don’t care about dual booting, you can just let the installer use the entire hard disk, and that greatly simplifies everything. If you decide to go back to Windows you’ll have to go through that process, of course, but usually you make recovery media early on in your system’s life, and you could boot from that to get back to a factory state.