In nearby Guatemala, I recommend ICA Spanish School in Quetzaltenango (Xela).  My husband and I spent two weeks at this school in 2014.

Description of a movie

Last week I watched a movie called Collateral Beauty.
It’s a drama about a man who lost his daughter, starring Will Smith. I like the soundtrack and I’ve added those songs to my playlist.
The main character (Will Smith) is Howard. At the beginning of the movie, he is giving a motivational lecture to his employees. He is a successful, strong, and confident man who leads his own company. He is surrounded by friends and other good people.
After that, we see events from two years later.
Howard is depressed. He doesn’t want to work, lead people, or live. He feels so bad because his daughter has died.
So, his best friends decide to help him because he can’t handle loneliness and depression. They found actors to play three roles for Howard. These were Death, Time and Love. These actors performed very well; they played their roles and help to solve some of the problems with Howard’s friends.
After that Howard joins a group where people discuss their children who have died. He talks with a woman who has lost her daughter too, but he doesn’t talk about himself he just listens to her story.
At the end of the movie Howard signs documents to save his company (earlier he refused to do that) and went to the woman's house and we discover that she was his wife and they had told us about their daughter earlier…
It was a good movie.

Very good, Nikolai!  In describing an event or movie, keep it either in past tense or present (present is very common).  I kept your writing in the present tense, except where you described the creation of the movie (the actors Death, Time and Love). 

This is a highly debated topic. :-) Excerpted from The Guide to Grammar and Writing: "Some writers will say that the -s after Charles' is not necessary and that adding only the apostrophe (Charles' car) will suffice to show possession. Consistency is the key here: if you choose not to add the -s after a noun that already ends in s, do so consistently throughout your text. William Strunk's Elements of Style recommends adding the 's. (In fact, oddly enough, it's Rule Number One in Strunk's "Elementary Rules of Usage.") You will find that some nouns, especially proper nouns, especially when there are other -s and -z sounds involved, turn into clumsy beasts when you add another s: "That's old Mrs. Chambers's estate." In that case, you're better off with "Mrs. Chambers' estate.""

They are both correct. Also: "The mall will be closing at 9 pm tonight." Which one is better may depend on the context.

Languages don't always have an answer to why things are done the way they are. This is from the online Cambridge dictionary: "When we ask for permission politely, we can use "would you mind if I + past" or "do you mind if I + present": Would you mind if I turned on this light? Do you mind if I sit here?"