I don't think you have to learn the whole program to manage a decent site. I probably only use 20% of Dreamweaver's features and still don't believe I've unlocked its true potential.
I know it's a bit intimidating but if you find a template you like and you learn how to make basic edits, you'll find it's not really that bad.
Just make a backup copy of your template and start playing around and yes... messing up. That's the best way to learn. Get those hands dirty!
As Rob said, download a template you like and open it up in DW. I think a template will make the process seem less frightening.