How's my setup and posture?
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Only thing I noticed right away is that your feet are pointing straight forward. It is generally recommended to flare out both feet. It helps with hip rotation on the backswing and getting your leading knee forward on the downswing.
And I think I've read something about it putting the knee in a better position to avoid injuries.
Overall, I think it looks pretty good. The lower back looks soft, hands hanging almost straight down, head is down so you can look at the ball without straining the eyes.
I don't know if the pictures are representatives of your posture when playing golf, but a little forward press of the handle could be good. It's easier to review individual elements if we see the whole swing.
We look forward to it. Please check out the following thread rules before posting. I just makes it easier for other readers and shows the best way to film your swing.
Are you comfortable with knee flex....legs look a little straight/locked?
Hands are well back....suggest you consider at least a small amount of forward hand press.
Spine angle from face on looks very vertical. A lot of golfers have success with some secondary spine tilt, or more simply, the spine leans away from target. You can get this by bumping hips toward target without the shoulders moving toward target. Get that left hip over left knee which is over left ankle....
From the first pic, I'd say relax your wrist and allow more natural angle to exist with your wrist and club.
From the last few sets of pictures, I'd say you need to, maybe, relax your arms a little more, little more flex on your knees.... can't really tell with the loose pants you're wearing.
Other than those, your address look fine.