to the forum Richard.
Download "Stellarium" - it's free and very useful for navigating your way around the sky, and for planning your viewing sessions. "Skytools 3" is a great astro-planner, but it's $99 for the standard version.
Find/buy/build yourself a good adjustable observing chair - comfort at the eyepiece significantly improves the observing experience. Perhaps a laser collimator might come in handy for the Dob. Stick with your supplied eyepieces for the moment, they are reasonable quality Plossls probably.
Don't get too carried away with purchasing just yet. You will get a better idea of what you need as your observing experience consolidates.
Cheers
John