Ziggy,
I too would strongly caution you against taking this action. By your post you don't have the requisite skills or knowledge to undertake such an adventure, yet...The good news is that by taking baby steps...you could gain such knowledge and isn't learning the whole point of school?
I would read a few books and then have a weekend "survival experiment" in your own back yard. That way your parents can keep an eye on you for your safety and if you decide to "throw in the towel" you can just walk inside and get a nice warm bath and a stomach full of food.
PLEASE PLEASE PLEASE don't go through with this project until you learn a bit more about yourself and the wilderness.
P.S. If you insist on making this film...You can make it appear to be a "survival" video but have your parents and an experienced hiker/camper in your "technical crew." They can stay off camera but keep an eye on you.