I don't know much about spin bowling but would like to know it all.

I have never played cricket as growing up in Derby it is not a big thing and isn't widely played (even at County level) so I just need to be told from a fans point of view. I am aware of a few phrases but don't really know much.

What is the difference between finger and wrist spin?
Who does the above?
Does anyone do both?
Is one better than the other?
Is one harder than the other?
What is a leg break?
What types of spin are there?

As you can see I know very little but would like to learn, don't limit your answers to the example questions above.

Cheers

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Steven