Hi Chemman. That's a good image, but I think your scope and camera can do much better. If you don't mind I have some observations and suggestions.
Before jumping into colorization, you might want to stick with greyscale to get the details right.
Not sure you're tuned to be exactly on band. Otherwise this might be due excessive processing and too high a contrast - all the subtle detail is missing in the active region. You should be able to capture both disc detail and limb detail. Your limb seems to go to extinction. Even without prominences you should see at least spicules and the like at the limb. I have found the key is to not overexpose your initial capture while keeping gain and gamma to a minimum, and to be judicious with additional contrast enhancement and sharpening:
Once you get that down, then you can colorize as much as you want without significant loss of detail:
These were also made with a double stacked 90 mm scope and a PGR Chameleon (ICX445) using FireCapture and RegiStax6, with additional processing in PaintShop Pro.