Thanks, dogsbody70.
My errors were plural, so I think "I understand what were wrong" is correct, grammatically. But if so, "I got it" is wrong too. It should be "I got them."
Thank you for your correction.
Besides, I've learned a brand-new word; "a makeshift contraption". Thank you.
You feel that the woman looks extremely calm and happy (at least not unhappy), right?
I feel that the woman looks calm and unhappy.
Maybe gazing at her own reflection in the water and thinking about how to commit suicide....
How-you-feel and how-I-feel are different somehow....
Maybe it is the reflection of
my mental status.
(It is a joke. I'm an extremely happy man, because of this forum!)