Hi,
It all depends on which software you want to use. On the free side of things, there's ExpressPCB and ExpressSCH with help and manual available on their site and throughout google. There's eagle, PCB123 and many more, most having valuable information available simply through google. Now, if you buy something, there's Pulsonix, ARES, ORCAD, Altium, etc. There's tutorials available on google as well, along with in their help menu and website. This should be fairly sufficient.
Hope this helps.
Tahmid.