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First off try for the Moon.
Second, without tracking you can get good widefield shots with a camera lens. Relatively short exposures of the Milky Way (up to several seconds). You can take multiple exposures and combine them with software like DSS (deep sky stacker). Stick to wide to widish angle lenses (<40mm). You will still get some motion blur from the sky moving but you can downscale the image to mitigate that.
Next thing may be to get a basic tracking mount and use a telephoto lens or short focal length refractor. Do stuff without guiding first. Just learn about tracking. Then add guiding and learn that. Then you'll be in good shape to move up to bigger scopes with narrower FOV and more expensive equipment.
Forget about using your 10" Dob/Newt for a while. It's definitely doable but you'll need a mount that costs very roughly 10x your scope and a lot of effort and skill.
I know it's very attractive to want to do what pros or highly experienced amateurs are doing off the bat but it's kind of like learning to play the piano. You cannot start with Liszt Rhapsodies or Rachmaninov Concertos. You've got to do your Czerny first ...
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