Hi Sporty78 
The tutorial from Winhelp that Pondus posted is a very good start.
And of course the Avast Faq.
Also in the Avast user interface you can get a lot of information by clicking on the questionmark ( ? ) on each page.
But when you are going to explore the user interface, make a back up from your ( default ) settings first : Avast - Settings - General - Back up setings.
Greetz, Red.