2) scene description

This is actually completely optional. Personally I don't like to take too much time describing the setting unless it's very important to plot or if I just gotta fill the paper.
I wouldn't take too long to describe your setting, because you might lose the reader.

Looking at you, Dickens.

The grass. The green grass. The long green grass. The long green grass that smells like cheese.

Try not to describe too much detail on every object or every little thing. If the story took place in an old house, you could describe the creaking floors and the dim, dusty lamps, but the readers want to know about the ghost lurking about. Not the wallpaper.

Or if your story takes place on another planet. You can tell me about the advanced technology that far surpasses the human race, or how the flying saucers zip past your face with a "zeeeeoooooommm"

But I wanna read about the aliens. Not the purple grass.

For some reason I am against grass descriptions.

At the same time, this could also be a stylistic choice. Hence, Charles Dickens, upon whom I haveth thrown the darkest of shade.

There is nothing against writing detailed scenes. This is just my personal opinion that if I'm reading about the same bloody lamp for 3 whole paragraphs, I'm gonna flip my shit