OOOH The plathora of items to see
You have brought in what many of us would say is the best place to start, congratulations.!!!
Like mike said Orion is a corker, i have the 10" version of the scope you have and it shows up brightly and a member named daniel has the 8" dobsonian and said that its nearly as good in that too.
Easy to find use your map to find it. Also Peladies (7 sisters) is a excellent target. easy to find, my partner uses the astrisim is that its a Kite with the diamond and tale, I can see it from inner metro perth so you should see it easy.
Only one thing that you will need to look at is Collmination, this is the process of lining up the Primary mirror (at the bottom) and the Secondary mirrror (top) together to give crisp clear images.
The easy way of doing this is a laser collminator (be careful the cheaper ones have to be collminated aswell before use. or a Cheshire eye piece. Best practice is to utilize the benifits of both to give you a quick easy painless collmination. There are many threads scattered thoughout this forum on the practice, just use the search function.
Good luck and remember that if you need any help, just post a message and one of us will get back to you quick smart.
Brendan