[gentoo-user] New Installation

I've not install Gentoo for some time and have some questions.

It is Solid State Disk 1TB
I'm using Minimal CD (Bootable USB)
Created three partition (I did not create SWAP as I have 16GB or RAM)
I used "fdisk" and follow the instruction from:
https://wiki.gentoo.org/wiki/Handbook:AMD64/Installation/Disks

Though, I'm a bit confused. I did not see the change root command in
those instructions.
Right now I have a prompt: "livecd ~ #"

and all instruction on the installation page showing: "root #"

I've created a user: "livecd ~ #useradd -m -G users john"
Will it take effect I'm still inside "livecd" environment.

I'm confused a bit.
-- 
Thelma