I had the same issue with my left elbow, physiotherapist treatment worked for me to reduce the pain. Then strengthen the forearms and wrists, I'm stronger and pain free and enjoy hitting a golf ball, I looked online for golf stretch and strengthen exercises and now have a routine that helps me. Good luck...
I guess it's not extremely "unconventional" but I think many parts of the swing goes against some of the more "standard" teachings, or at least what I see on Youtube (forgive me I'm still relatively new to golf).
Some of the differences of this upright/2-plane type of swing, according to the Jim Hardy 2-plane swing vs more "standard" golf teachings:
Using more of the arms to generate power, rather than the body
Having less depth at the top of the backswing
Being slightly across-the-line at the top of the backswing
Having a more open club face coming down
Less body and hip openness at impact
Of course not every "upright swinger/2-planer" adopts all of the above, but those are the things that Jim Hardy mentioned in his book and I'm trying to follow it as I don't have any other guide.