The third question -
The truth is all that stuff is terrible writing. The only web novel supports that stuff, and even then, it's only to talk about how sexy a woman is- the standard jade skin, huge tits. Etc we find in many novels. If you want to bring things up, make sure it affects the protagonist. For example, if he is a teenage boy, the whole jade skin thing might work. If you describe a setting, it should be to add a feeling, or emotion, or to cement a fact.
For example, if the gun on the wall, alludes to the fact that the owner of the place sells firearms, or is part of a black market or whatever. It works. But, if you're adding raw data into your novel, your readers will be burdened with too much information.
If your brought into the past, and you found yourself in your old home. The details of the home are the things that you would look at because it would act as evidence to an abnormal situation, but if you're going home on a normal day, you would rarely think of it.
If it's snowing, and the protagonist is cold, that's important. If it's snowing 100 miles away, and the protagonist is not even aware, you should not be writing about it.
In short, writers should only add details that affect the protagonist. If you wana write about blue eyes, write about what it does to the protag. If it does nothing, don't force it. You can bring that detail up in conversation etc.
Like
A girl venting, "OMG if only I had blonde hair and blue eyes."
Protag. "There is nothing wrong with your eyes, I think there cute."
"Shut up! Every girl has brown eyes. It's so normal."
It's impossible to write about every detail and most details are not important. Image writing like billy walks into a store-Then describing all the objects in the store. The type of tile, all the other people within, etc. Then he goes in buys a soda and leaves.
Your readers would be pissed. They had to keep track of all that data. Simply so that the protag buys a soda?
Don't like this post. Thanks <3