

From quick math with 500 rule (500/focal length ) it comes up with around 10s for your camera + lens. More frames means better image.
For F number use as low as possible and adjust ISO for balance.
For stacking use Dedicated program like DeepSkyStacker or Pixinsight. It will enable you to have hundredths of frames.
For more info check https://r-astrophotography.gitbook.io/r-astrophotography-wiki/stacking-dsos
If you want you can find an object on this map: https://www.skymaps.com/downloads.html and try to point the camera towards it. It’s harder than you might think.
Good luck and clear skies.
You have some dust on your lens! Next time you should take flat frames.
Great pic!
Definetely crosspost to !astrophotography@lemmy.world