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JD as a first attempt it is ok. Your camera is obviously not tracking the DSO properly as evidenced by the tail on the stars. Don't worry about the blue halo effect right now. The Orion,colour looks pretty good. Re bias frames, just set your camera to a fast shutter speed (like 1/4000th) and shoot with the cap on - it is suppose to just pick up the sensor native noise, pixels (hot and cold), and will be stacked with darks (capped subs of the same duration as your lights). You need to create a Master Dark and Master Bias but DSS will do it for you if you just put the files in the right category when you list them.
Good luck.
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