Installer images are here. It is recommended to get the latest, which is, currently, the FreeBSD 14.2-RELEASE. Both ISO (DVD) and memstick (USB@solid-state) images are available.
Note that FreeBSD uses the name amd64 to refer to the x86_64 architecture. So, most PC users would get either the FreeBSD-14.2-RELEASE-amd64-dvd1.iso (~5GB@~4.5GiB: huge, all-in) or the FreeBSD-14.2-RELEASE-amd64-memstick.img (~1.5GB: slightly smaller, may need internet connection while installing). Smaller installers are available as FreeBSD-14.2-RELEASE-amd64-bootonly.iso (~460MB) and FreeBSD-14.2-RELEASE-amd64-memstick.img (~560MB), but would most probably need an internet connect during installation.