+1 for Firecapture/ AS3!/ Registax 6
the other freeware for image enhancement is ImPPG
https://greatattractor.github.io/imppg/
The DBK21 should work well for solar/ lunar/ planets.
With the Canon (which model?) you can start with the Canon Utilities (should have come with the camera) and a remote.
https://www.amazon.com.au/Neewer-Shu.../dp/B0081EC08M