Try using FireCapture if you haven't already. I found it handy. Also if you're still learning try to at least keep your source files you capture, when you figure out processing you will want them to reprocess.
I assume you haven't done any wavelets on your image above, you're going to freak when you finally see how much you can reveal from the same footage
Don't worry too much if the planet is all "swimmy" in your video preview or if the planet looks under exposed. The processing uses tons of frames and you can end up over exposing, single frames being under exposed isn't a problem, and seems to allow more detail to be revealed.
When I first started webcam capture I was disappointed until I played with wavelets then suddenly my dull muddy jupiter popped out bright and crisp with banding and the great red spot clearly visible. It was a great rush of excitement and i kicked myself for deleting what I'd thought was bad footage. Getting a workflow that would give me an image and writing it down so i didnt forget gave me a repeatable process I could then get better understanding on and start improving each step. Keep at it!