If you are starting with WSS and/or MOSS 2007 then I must recommend this book.
I just finished it and I am very glad I did. I gives you a clear overview of WSS and MOSS and explains the difference between the two products and when to use which product. Luckily th eauthor has a good sense of humour making this book an easy reader.
So check it out.
Beginning SharePoint 2007 Administration: Windows SharePoint Services 3.0 and Microsoft Office SharePoint Server 2007
by Göran Husman
You know that you can take a full backup using stsadm. With this knowledge you can also easily schedule this commandline in the Scheduled task as follows:
Open Windows Scheduler (Start-> all Programs -> Accessories -> System tools -> Scheduled tasks)
Click File -> New -> Scheduled Task
Enter a Name for this task, e.g. Backup SharePoint
Double click on the hnew Task to edit.
in the Run Text box enter: stsadm -o backup directory \\server2\backup -backupmethod full -quiet
in the start In textbox specify: C:\Program Files\Common Files\Microsoft Shared\web server extensions\12\BIN
Switch to the Schedule tab and specify when this task should start
Click OK to save and close the task. Then Test it