Don't feel too small, we all started at one point. If you read through the forums you will soon realize that you aren't the only one who that has happened to. Besides, you should see some of the questions I have asked in the past.
As for your movie question. All information is extracted from the database (as you most likely have seen). The easiest thing to do is use DVD Profiler, or ANT (Ant Movie Catalog), and catalog your movies. I don't have experience with DVD Profiler, but with ANT I do. You then use the XAnt plugin, and follow the instruction doc (English version is available). So what this all does, is ANT will fill in movie descriptions, titles, actors, dates, directors, coverart, etc. The XAnt plugin will extrapulate this info and create a database using the proper fields. Then when you go into the movie screen, and select a movie, you will get all this info (depending on how you skin the screen). DVD Profiler operates basically the same way, but as mentioned, I haven't used Profiler before so if you went that route, I couldn't help ya, but there are plenty here that could.
Hope that helps.