For short exposures with a "slow" SCT they've come up really well
The squiggly lines are hot pixels, these still exist even if you cool the sensor but there is less of them. Darks will remove most of these and also using pixel rejection will remove them too. My understanding is that SharpCap average stacks the images together but doesn't do any kind of pixel rejection. So, what you're seeing is the natural "walk" at the mount is doing. Guiding and dithering will fix that particular issue but I'm not sure whether you can dither through SharpCap or not.
That fingerprint looking thing to me looks like frost on the sensor. This appears in warmer more humid environments (like Darwin) and it can be mitigated a bit if you cool the camera down slower. I've started cooling my ASI094 down over 10 minutes and I've found that works better than letting it do it as fast as it can.
As for processing these in PixInsight, you'll get a better image if you do proper pixel rejection but I'd say if you're going to go through that effort you'd be better off getting some darks and flats first so that you're dealing with the cleanest data you can
