vJass Various Unanswered Questions

I've recently made a transition to Jass but there is little I understand. What I need is a little help understanding certain concepts and such that I haven't really found out about from any tutorial.

1. What is a Scope? And how do I use them/ what is the proper syntax?

2. What is a library?

3. What is the difference between a private and a public function? When are the necessary? Couldn't I just use function?

4. What does it mean to use vJass? The way I understood it is using JassNewGen Map editor...

5. Where did everyone go to learn about these and other complex concepts? As well as where can I go to learn these things?

I probably have a few less important questions but I don't remember them. Having these things answered will make everything much easier, so thank you for just reading this, and thank you again if you can help me out.

All of your questions can be answered by reading the vjass tutorial thingy in the JassNewGenPack folder that you get when you unzip it in this folder:
A scope is used to give everything within the scope a prefix. This is especially useful for spell making and making things easy for people to modify (AKA submitted spells)
You can also use the private keyword inside of a scope for global variables and functions to make them not be accessible elsewhere. In this case, if you looked at your .j file it would show "Rawr_MyFunct" as that function's name.
Say you wanted to move all of some system's code to the top of your map's .j file so you could run the functions wherever you wanted in the map and not have to worry about it. You can use libraries to do that.
Libraries are more modular than scopes, but are used for different things. You can give libraries initializers (Things that initialize the library at map initialization), you can reorder them by demanding they 'require' other libraries, and so forth. The details can be found in the explanation file mentioned above.
Private helps prevent collisions and basically helps protect you from yourself when coding. Public means the function is available for use outside of the scope (Meaning you can call it from somewhere else). In this vein, private members get their names randomized on compilation so you can't screw up and call them elsewhere, but public members do not (Meaning you can call them elsewhere).
Using any of the coding features made available to you in the Jass NewGen World editor is referred to as using vJass.
The jasshelper manual I explained at the very top of this post.

Thank you both. You both answered all my question perfectly to what I needed, and I have already begun reading the manual. I wish it was a bit easier to find though, except that I didn't really think there was a manual! Anyways I found it now and I will make myself as knowledgeable as possible with this new info, thank you!