First

I saw a movie last night about two men. They used to be sales people in a watch company but the company was suddenly closed down. They lost their jobs so started to look for new place to work which was Google. They narrowly missed [use narrowly if it didn't happen, if they did get the internship then use 'they just managed to get'] a chance to do an internship at Google because they were too old to work as interns and did not know enough [you can use ignorant but I would usually use it in a more negative sense] about IT. Then guess what happened to them. [Is this supposed to be a question? Or are you trying to say 'So that's what happened to them?' It's so cliche, but very funny.

I'd use the past to describe films or books.

I'm not sure whether I should use the present tense when I talk about the story of movie or book. I thought I've been learning English for a long time but I'm really poor at speaking and writing in English. It takes long time to make some sentence. So I made up my mind to watch films and dramas in English a lot. I hope I can be like native speaker someday.

First

I saw a movie last night about two men. They used to be sales persons salesmen/sales people in a watch company but the company suddenly got closed. They lost their jobs so  they started to seek a new place to work and that was Google. They narrowly got a chance to do an internship at Google because they're too old to work as internship interns and too ignorant about IT. Then guess what happened to them. It's so cliche, but very fun funny.

I'm not sure whether I should use the present tense when I talk about the story of a movie or book. I thought I've been learning English for a long time, but I'm really poor at speaking and writing in English. It takes me a long time to make some sentences. So I made up my mind to watch films and dramas in English a lot. I hope I can be like a native speaker someday.

First

I saw a movie last night about two men. They used to be sales persons in a watch company but the company suddenly got closed. They lost their jobs so started to seek a new place to work and that was Google. They narrowly got a chance to do an internship at Google because they're too old to work as internship and too ignorant about IT. Then guess what happened to them. It's so cliche, but very fun.

I'm not sure whether I should use the present tense when I talk about the story of a movie or book. I thought I've been learning English for a long time but I'm really poor at speaking and writing in English. It takes a long time to make some sentences. So I made up my mind to watch films and dramas in English a lot. I hope I can be like a native speaker someday.