For electric rhythm guitar, if I understand you correctly, you don't have to play Barr-chords at all.
If you start, say with a few enjoyable riffs from Pete Townhsend and The Who (all online somewhere these days), most of them are simple open chords.
An A, D - E-sus (especially, but two fingers, everything else is open, and it sounds great) can have you windmilling your arms and jumping off the
couch in no time.
Then metal power chords only take two fingers, and with distortion can easily displace a full Barr-chord.
I mean all the first finger of a Barr-chord is doing is moving the nut up, so instead of playing an E you're now playing an F. You've gone one
semi-tone up. You might as well use a capo, if you really want to change pitch.
Now although some open chords sound very good both an electric guitar and acoustic guitar, playing most of the complicated ones or full Barr-chords
are usually a waste of time at first, since you'll have to learn how to only hit three of those strings and silence the rest.
My advice for a beginner is rather learn three or four open chords like E, A and D (and how to sus them - very easy and good sounding, usually takes
removing or adding one finger), and the rest you can do with two finger power chords.
There's probably many rockers who've never played a full Barr-chord on an electric guitar.
There's also folk-guitarists or acoustic players who don't like doing it either, and they rather use a capo if they want to shift keys higher.
Unless you only want to play only reggae, jazz or disco (even then you can use a capo), but they your rhythm hand needs to be pretty nifty too. A
The only convenient thing about a Barr chord is, if you walk into a jam session, and somebody says, play an A flat minor (for example) I know exactly
where it is. But you can do that with a two-finger power chord too in harder rock.
[The only real thing to remember, which confuses a lot of beginners is there's no sharp/flat between E and F and B and C. So if you take the open E
string your first power chord is F, then G flat, then G, then A flat, then A, then B flat, THEN C, then D-flat, then D, then E-flat, then E, then F
again and E again (repeat). So yeah with a basic E Barr chord you can find all those chords very easily on an electric guitar, whereas on an acoustic
guitar it's probably better to find a chord dictionary, and some weird fingering.
Same goes for the A-string root (and power chords only play the root note and the fifth): A; B flat; B; C; D; E flat; E; F; G flat, G ...]
But you don't need full Barr-chords at all!
In fact, for beginners I'd actually say don't even look at full Barr-chords until you can play E, E-minor E-sus (the same with A and D) openly, and at
least 10 other full open chords, or you won't understand what's going on.
edit on 6-11-2019 by halfoldman because: (no reason given)