I know that this seems pretty much the same as photography but please hear me out.  I would say that astrophotography is just much much different from conventional daily photography. Normally, I just pick up my camera and snap at anything that my spirit told me to, mostly in auto mode, but when doing astrophotography, using auto mode will definately give you a picture of a dark starless night sky. From my experience, in order to get a good image, I'll have to adjust

• A fairly high iso (light sensitivity) but not too high since the image would start to contain noises and become less sharp

• The lowest aperture value that my camera can do (2.8 and 2 for my two cameras) to let in as most light as possible

• A shutter speed of 20 - 30 second which will require extra care to not mess the photo up.

And with such long shutter speed, a tripod is very much necessary. These knowledge are actually quite easy to obtain from the internet but the setup that people on the internet use often won't work for us as our condition (camera, lens, filter, location etc.) are vastly different. I best approach I could come up with is just to start at random setup then start adjusting it according to the image that I get until it look pretty. I've been practicing this since mid 2022 when I got my first camera. However, one challenge that is present is the fact that for most of the year, there are just too much clouds or the sky is just too dark to see any stars especially in Bangkok.