I’m not good with computer programming can someone plzz help and fast

Why the bear has a slunky tail determine the meaning of the word slunk in the story

I'm taking a class on how to make a movie, and it offers some apps that would be in the process. the thing is, i don't have any of those ha. if you have any tips on some apps i could use, that would be awesome. i don't have an iphone, so don't suggest any apps like imovie. i know that this is a weird question, but it would be super for me. : )

How do you take a green screen out of the video while editing?