Hi Rob,
welcome to IceInSpace
You are about to take your first steps into a wider universe, very exciting.
Ask lots of questions, we love to share our passion.
I agree with Raymo,
The skywatcher 8" Dobsonian is a great piece of equipment.
It (generally) comes with 1 or 2 reasonable quality plossl eyepieces.
You don't need anything extra to start observing, but some recommendations
A planisphere (make sure it is southern hemisphere one) to help orientate and find stuff.
Stellarium is a great (FREE) PC based planetarium software that shows exactly what you see when you look up.
For comfort at the eyepiece, you may consider a right angled finder scope to save your old neck from aching.
And a height adjustable stool (like a gas filled bar stool from Aldi)
Good luck with your adventure.
Where abouts are you located?