Where can I find good gospel piano lessons?

I would go to one of two sites:

1. Black Gospel

2. Praise & Gospel

Positioning a chord on the piano keyboard

Positioning a chord on the piano is called "chord voicing". It means to arrange the notes of whatever chord you are playing in some order so that you obtain the sound you are looking for.

Sounds simple, and in a sense it is, but it also separates the boys from the men and the girls from the women when it comes to getting a unique sound.

For example, the F chord is composed of 3 notes: F, A, and C. But I can invert that chord, I can "stretch it" by leaving more space between various notes, and I can slightly offset the notes I play rhythmically so that a unique effect is obtained.

For a bit more information on chord voicing, go to: Piano Chord Voicing.

http://playpiano.com/101-tips/64-voicing.htm