Originally Posted by: metal.totocan somebody tell me where to start first?

I did a tutorial that is a brief overview of music theory:
http://www.guitartricks.com/tutorial.php?input=495

Also, both of our beginner courses offer a good intro to guitar layout, major and minor scales, major and minor chords and the relationships between all of them that form the basis of music theory:
http://www.guitartricks.com/course.php?input=1
http://www.guitartricks.com/course.php?input=2

Hope this helps. Let us know how it goes for you!