It's easy to make a movie if you put your mind to it! What's more the software you need is freely available on the internet.
Just follow this link and download Windows Movie Maker. It's a free Microsoft application that allows you to create short movies and videos with special effects and lots of other cool features.
Install it and you are ready to go!
Don't hesitate to experiment with it and try it out in any way you like. Simply back up your video files, save your project, and you can undo anything you might have done that you don't like.
Just watch this video first to get the general idea about how the program works and have fun playing film editor.