Now that you are booted into a Gentoo environment you are going to want to check that your networking device is enabled and has an address as we will need it during the install.
Some commands to help with this are emerge --ask -jv app-editors/vim app-admin/syslog-ng sys-process/cronie sys-apps/mlocate app-admin/sudo app-admin/logrotate app-misc/screen app-text/tree app-portage/gentoolkit app-portage/portage-utils net-misc/dhcpcd net-misc/netifrc Now we should be able to shutdown the system and the power back on into your working Gentoo installation.
Although the system itself is known as Portage, it consists of two main parts, the ebuild system and emerge.
The ebuild system takes care of the actual work of building and installing packages, while emerge provides an interface to ebuild: managing an ebuild repository, resolving dependencies and similar issues.
Unfortunately for the Linux user community, distributions like Ubuntu have made it too easy for your mom to get a working Linux box -- so they are all running in horror.
It is the exemplar of the term "hemorrhaging edge" -- there is no piece of software too advanced, too experimental, or too downright dangerous for the main tree.
In fact, if the users don't crash their box at least once a week due to new and untested software they will swarm onto the forums and accuse Gentoo of "going all Debian" on them.
For more in depth installation details visit Gentoo Wiki Download the latest install CD from your local mirror for example, Internode File Mirror Create a bootable USB using Rufus or Unetbootin and boot your machine from the USB drive.
When booting from the USB the Keyboard and Mouse should be detected by default, if you have issues with them not working then try toggling USB Legacy support in the BIOS.