Hi Ziggy,
Your post has actually caused me a little bit of concern. I think you may need to provide a little bit more information before answering some of the specific questions you have given.
None of us don't know that much about the wilderness or the forest in general
This has actually caused me a little bit of concern. The first thing to ask is what ages are you and your friends are, as you have mentioned that you want to 'try' and 'survive' in the wilderness for 3 days as part of a school project.
What level of navigation skills do you have? Navigation in wilderness forests is actually quite challenging. 3 point resections are notoriously difficult in wooded and forested areas.
What level of survival equipment are you going to carry? (Man V Wild is a definitely not for beginners and trying to emulate some of these survival techniques shown on this TV show is going to yourself or your friends into trouble.)
How much time have you spent in the wilderness previously? Have you used traditional modern camping equipment before for example.
Sorry to ask these questions but the questions you have put forward appear to be quite naive. (We have all been there before of course and most survival knowledge is really just common sense combined with a few specific skills, navigation being one of the most important !!)