I have a selfie stick that has a built-in tripod.
my expertise is still limited on how it works to be fair, but I'm using the RAW app on my phone that has a specific astrophoto mode (picture below)
that basically takes pictures depending on the selected duration (exposure), I want to take more pictures from my window, unfortunate thing about it is that the nights are still relatively cloudy, so it makes it nearly impossible to capture them. But I hope once the summer rolls around, the nights will be less cloudy, I will also be going out during those times where I can take better and more pictures, until then window capturing will do.