There are far too many pictures to comment, but the overall look is pretty good. 👍
But you wanted advice, so here comes:
Make horizontal rows of four or five pictures by putting a space between them instead of enter. After the row press enter of course.
You might also want to brighten up your pictures, put the EV value to 0.5 or higher when taking the shots. If possible, increase brightness and contrast with an image-editing program.