I forgot to respond to the other part of your question. I have the same telescope and I have spent the last 10 years imaging double stars. I have been imaging with a setup called "eyepiece projection imaging". The eyepiece acts like a magnifier just as it occurs with observing through an eyepiece. With any magnification, there is a significant loss of available light to expose an image. Just as you increase the magnification at the eyepiece and find a general darkening of the image (more contrast), the same process is happening when you image through an eyepiece or a barlow. I began imaging with a 13mm Hyperion eyepiece but it caused the stars on the outside perimeter of the image to be distorted, a phenomenon resulting from field curvature...a topic for a later date possibly. I purchased a 2.5x, 2" diameter barlow, Celestron Luminox, and it provided the same magnification/fov as the 13mm Hyperion but with a minimum of distortion.
To address your question specifically, if you are going to image the moon and the bright planets, magnification with a barlow will work. If you want to image galaxies and other DSO's, Deep Space Objects, magnification will not work, primarily because of the reduction of available light to excite the imaging chip. You can certainly image with just the camera and using the telescope like a large telephoto lens and there are many DSO's that can be imaged with your telescope. I have done it. They call this A-Focal or prime focus imaging.
Hopefully that answers your question. I think the quickest way to learn the limitations of your equipment is to get out and image. Make sure you make or purchase a Bahtinov focusing mask. It is indispensable in acquiring sharp focus.