OK, the strings (unfretted) are, from the bottom (lowest notes; actually higher off the floor the way most people hold a guitar) are E, A, D, G, B, E. So you've created a G chord and you want to augment it (sharp the 5th, right?), figure out which string is sounding D (it's the unfretted D string), and then figure out how to get a finger to the first fret on that string. Simple? As simple as it was learning to do what you do on a keyboard, I'm thinking. Some of it is rather acrobatic, but hey.

Specific voicings of chords may or may not be reachable, given the length of your fingers. Sorry about that. Do feel free to leave a string unplucked if it violates your sense of proper voicing. Finger-picking or flat-picking lets you do stuff like that, while (of course) simple strumming does not.

Re: left-handers... I've never understood why they make right handers fret with their left hands; there's in general more dexterity required there than on the plucking hand, at least at the level I've reached. So you have the advantage.

Hm. Must remember to take my guitar to the shop soon.

Regular, or decaf abomination? --Kellnerin