First of all, I wish you good luck with your first film. It takes some work, but it’s very rewarding and a enjoyable experience.
Second off, MAKE SURE, that you just film the scenes, worry about the titles and music and FX later, that is all done on an editing program. It doesnt matter if you don’t shoot the scenes in order, since that is what it is for. You can rearrange and split scenes, add music and new sounds, and also add in cool effects and titles with this program. If you have a PC, its called Windows Movie Maker (it comes with your computer). If you have a Mac, its called iMovie (also preinstalled)
Those are some of the mains things that needed to be addressed. But most of all, I wish you good luck!