Hi matt
To start with, just hold a digital camera up to the eyepiece and take a photo! That will generally only work with the moon or a bright planet.
It won't work for DSO's or anything faint as you need a long exposure.
For progressing after that, check out:
Astrophotography with a Dob
I put my 10" dob on an EQ platform after doing non-tracked photography for a while.