Well, I am surprised by your comments
I wonder why? did my choice for fave pic of the set, surprise you? :)) well, when photos talk to the watchers... both sides take part in creating the final masterpiece :) the same thing as with reading. I may imagine something that not necessarily is in the photo, etc..
I tried to set the ISO and shutter speed manually
this is a great thing actually. I do the same a lot of time, when I do macro photography, it is essential part of it. (with my camera, I can change, adjust it plus-minus later, during editing in PS). I have no experience in taking great smartphone pics, my old iphone is pretty dated and has shitty camera.
PS. you did the pics in low-key, dark manner. was that your intention? it lead to a nice artsy resulting!