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Practice in front of a mirror. Practice playing different notes in different positions. Watch some of the fiddlerman videos to see where his elbow is. But yes, as you get used to it, your elbow will be more comfortable going in that direction.
Opportunity is often missed because it wears suspenders and looks like hard work.
One way I found ( plus from FM's vids ) to "be aware of the left elbow position" was/is to keep an eye on the actual fingering.
What I find (and it may be just for me) is - if my fingers ( on the G, for instance ) aren't completely curved, into - oh I don't best know how to describe it - an "open-O" shape when the finger-tip is on the string - and NOT a "kind of "flattened, outstretched finger, struggling to reach" - then I learned (and still have to be conscious of this until it becomes automatic) to swing my left elbow to the right, inwards towards the body - and it is not a HUGE movement by any means - returning what would have been a horrid "flat fingered stretch" to a nice, pointed, finger-tip drop to the string.
It still does not "feel natural" to me - but it is starting to become "automatic" - sometimes I now find my left elbow move un-bidded as I move between lower and higher strings - sometimes it is un-necessary (depends which fingers are in use! ) but for sure as I move to fingers 3 and 4/pinky on-string I definitely find that swinging the elbow, even slightly, to ease, and indeed improve the fingering and get that "open-O shape", starts to make things a whole lot easier for me.
No idea if this is normal or not - works for me with shortish, stubby fingers ! LOL
I seriously recommend not copying my mistakes. D'oh -
Please make your own, different mistakes, and help us all learn :-)