Hey Russ, Welcome! To the frustrating and satisifying world of Astronomy! (im having a frustrating day today)
Clouds always seem to mess up a night of trying new equipment, or looking for a new object.. it is our curse
You will get many nights of fantastic viewing using your Dob, they truely are a great scope! You will find the people here are fantastic and always willing to help, even when i ask for answers to painfully obvious questions
Make sure you download
www.stellarium.org which will help learning the skies a much easier task, and its free! also check out
www.worldwidetelescope.org for cloudy nights, its a great learning tool, a virtual telescope
and welcome again