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Not sure about Dobs, but you can start with what you have and shoot through the eyepiece.Or a smartphone mount that holds onto your eyepiece making mobile photography much easier. Then there are the T converters etc that let you attach your camera to the focuser just like an eyepiece. But you may get flexing from the weight that throws off the image and you may find your focuser doesnt have enough travel "inwards" I think to achieve focus with your camera. If outwards travel is limiting focus you can get extension rings. These are all for taking a nice single "photo" when you click.
Beyond this you are looking at recording video, striping out the still frames and aligning and stacking and processing these into a single final photo. I'd suggest a zwo asi camera, maybe the 120mm (mono, uncooled). If its not a goto dob you can say line up with the planet at the edge of screen, start recording video and letting the planet drift across the frame. If you can track then you should be fine for a couple of minutes capture. but not much more, remember the planets or not only moving but spinning too so you only can really use data from a couple of minutes window to keep surface detail.
From there there's no limit but the zwo are versatile cameras, just pop in like an eyepiece attach via usb to a computer (laptop usually), firecapture or sharpcap are free capture apps for astro imagers and a great starting point. What you are looking for here is fast frame rates not pixels. Colour would be good for planetary but mono might be best considering all the limitations of dob imaging. I'm sure someone else with donsonian imaging will give you bit more accurate advice.
Perhaps if you can start with what dob you have, tracking features if any. Its not ideal but also far from impossible and plenty here have used dobs successfully for imaging. I dont know if faint fuzzies can be captured well or not.
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