To get a little more into Ubuntu and have it run faster with more options you should install it to a seperate partition instead of installing it on the windows partition. This is not hard at all and ubuntu takes care of most of it for you so you can use defaults by having ubuntu partition your hard drive for you. If you want to select your own partition or seperate HDD(Hard Disk Drive) you can use manual as shown in the 2nd video clip below. The first clip just shows you the boot screens after you reboot with the cd in computer. This clip is cut short you will see the bar for about 3 minutes before you're on desktop.
This clip is howto install and manual partition(do not select manual unless you know what you're doing)