Getting Started with a iMovie (Mobile / iOS) Project
One of the best aspects of using the mobile version of iMovie is how easy it is to edit videos you have recorded with your phone. The links below will take you to Apple's documentation for the iOS version of iMovie and provide you with step-by-step directions to create your movie.
These are only the most pertinent items. If you have a question not covered here, you should be able to find it by using the table of contents from one of the linked articles.