New member - pulling left, thin and toe down at impact

The face on picture below has pull written all over it. I think your pull is coming from being "steep at the bottom". It looks like a combination of the lead arm shoulder blade pulling down and around and the trail arm joining it and going into more internal rotation. Which isn't directly attacked by any of the swing thoughts you mentioned. It could be related to coming in shallow and/or exiting high, but usually golfers with the shoulder pull pattern cheat and come in shallow from the body or exit high with the body or wrists instead of the shoulders.

I think this is my best explanation of the pattern, https://www.golfsmartacademy.com/golf-instruction/connecting-scapular-alignment-impact-alignment/, but for you it will probably be a combination of the arm being higher and feeling more internal longer (face will feel a mile open at first). You could also look at these two explanations.
https://www.golfsmartacademy.com/golf-instruction/moe-norman-arm-drill/
https://www.golfsmartacademy.com/golf-instruction/block-trail-arm-throw/

Good luck!

Happy Golfing,
Tyler

Hi! What do you mean by "--and feeling more internal longer"?

Thank you for the reply by the way, makes sense! :)

Feeling more internal rotation of the lead shoulder, or keeping the lead elbow pointing right of the target longer. It can help with avoiding the lead arm pull pattern. Like the picture of Brooks below.