When you first start observing or imaging, the Messier list of objects is a very good place to start looking for nice deep-sky objects in the Northern Hemisphere.
Stephen James O’Meara has produced a beautiful reference work on the Messier objects in this “Deep Sky Companions” masterpiece. Each Messier object is carefully described by Stephen as it appears to him through a modest refractor. In addition, a very useful black and white photograph accompanies each object so you can be sure that you’re looking at the right thing.
I refer to this book [as well as Stephen’s other 3 books that I will recommend] on an almost weekly basis. Full of very useful information and background detail – very highly recommended!
You can purchase the book at Amazon or any other good book retailer.