Hey and welcome!

The 2 Guitar Fundamentals courses are indeed the best place to start.

Originally Posted by: DenerynnHowever, this is not the same as the C major chord I learned from this other site.[/quote]
Worry not. :) We start with a very simple version of the C major chord to get absolute beginners moving. Very soon the course will introduce the full, 5 string version of the C major chord you are probably more familiar with. Same for all the simple chords we start with.
[QUOTE=Denerynn]
So, I'm looking to find out whether there is a difference between acoustic and electric guitars when it comes to chords

No difference whatsoever. The notes are all in the same place on both types of guitar.

Hope this helps. Let us know how it goes for you, ask more when necessary. Best of success learning and playing. Have fun!