MC uses the [Media Type] and [Media Sub Type] fields in specific ways. For you movies to be handled correctly, they need to be:
[Media Type]=Video
[Media Sub Type]=Movie
Then you can add any categorisation you like using fields such as Genre, Keywords, or any custom field you want to add to MC for the purpose. Some people add a [Sub Genre] field just to make that issue clear. Keywords can be nested.
It is then the power of MC Views that uses the metadata you collect or provide to display your media as you wish, and search for what you want easily. Views is what you need to learn about.
You have to import your movies into MC before you can add all the metadata you want, as video files generally don't support tagging, and MC puts video file tags into its Library and optionally Sidecar files next to the video file. You don't need to move your movie files to take advantage of this functionality in MC. Although I prefer to store each movie in its own directory, named "[Name] ([Year])" for clarity, and of course, full folder rips of DVDs and Blu-rays need to be in their own folder.
However, once you have collected or created the metadata in the Library fields the way you want it, MC has a powerful tool in the "Rename, Move and Copy Files" function that can move the files into a directory structure you desire, based on any of the metadata MC knows about.
The first thing to do is decide how you want to view or categorise your movies. Then learn about all the fields in MC and decide which to use. Read about Manage Library Fields in Options. Learn how to use View. Import all your movie files and start adding metadata. Build the Views you want.
That is the basics. The Wiki articles on View creation aren't brilliant, but the are some good forum threads. The is no "short course" on MC that would cover what you need to learn.
Have at it. Enjoy.