Really those will slightly help you but what will guarantee that you learn scripting in unity well is the Unity Scripting Reference. Considering that you have a fair grasp on other languages you should have a basic understand on programing and should be able to pick this up quick.
http://unity3d.com/support/documentation/ScriptReference/index.html
Everything is explained inside it, all you need to learn is how to piece it all together which is simple.
I am an artist myself and have solely learned from the Scripting Reference and the good fellows here at Unity Answers. I had a previous background in C in a basic level.
Best thing about it, it is free :)
Cheers,
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