>>4037227>>4038040>>4039939To add, find out the ISO invariance stages of your sensor; I have an a6300 and it's ISO-invariant between ISO100 and 400, so I don't gain anything being on 100 and struggling with a lower shutter speed to get light when I could just turn up the ISO to 400 and have a properly exposed photo without any loss of quality (AND with a more usable shutter speed) compared to having a dark ISO100 image that I have to brighten in post.
Both of your shots are very cool indeed.