Once you plug in the power adapter as your last step, the PI should start to boot. You will need a keyboard at the beginning as the touchscreen does not function from shell. Type raspi-config on boot, and set your raspberrypi to boot to desktop in the config options.

You may also want to install matchbox-desktop via 

sudo apt-get install matchbox-desktop

Add matchbox-desktop to the apps in your panel and you are good to go!