First question on the beginner lesson boards and not sure where this fits in - It relates to "G Chord Hacked" here -
https://www.justinguitar.com/guitar-lessons/the-g-chord-hacked-b1-602In the video he says to learn classic G "when you find a purpose for it" - Full G is "the" chord for the "La Bamba" Riff isn't it?
Anyhoo - I learned the G years ago with Ring finger 3rd fret low E string, Ring finger 2nd fret A string and pinky on 3rd fret high E string.
And by just rocking the Ring finger I can mute the A string as Justin says.
It seems to make the transition from C, F, well most of the "open" chords easier.
It's a minor adjustment I guess to use the middle finger on the low E and ring on the high E but is it that important to have that in the arsenal right now?
Going back to La Bamba - The C, mini-F, G (my way) transition is really compact transition. Roll the C onto the F then simply "jump" the middle and ring to the A-E strings respectively and plant the pinky down.
BTW - Don't ask me how I got down the La Bamba rabbit hole at this stage of the game. - I stumbled onto the riff practicing Jingle Bells - LOL...
Then I went looking and found a video of Justin playing it/teaching it. One of the coolest riffs in guitar history BTW...