I know the feelingel muchacho está perdido.![]()

I've always shied away from chords as I've never understood them even as a kid, I'm probably just over thinking it.
A couple of really basic questions, to hopefully help the light come on.
The 1 chord, will always be built the root of the key signature of the piece?
Each of the other chords, will generally be constructed with notes from the scale of the key the melody is in, but starting from a different degree? (eg a 2-5-1 is using the 2nd, 5th, 1st degree of the key as the root of the chord)
