as others have noted...you got a bit of an invisible bf going along...close the shoulders parallel with the board you are rotated a bit open
perhaps a couple of drills doing the same or similar run but
swing your arms back and forth...like when ur walking but exaggerate the swing of your arms and see the resulting of how that effects your board....and then do it and not swing your arms and notice what happens.
try to squat and compress into a small snowball, rest your forearms on your quads/thighs...go as low as you can...cruise around like that with those smooth mellow turns that u were doing and then do it but stand as tall as you can...notice what happens between the two positions
you look pretty smooth and comfortable....now push youself out of your comfort zone....start trying to mob around with others who are better...ride up...like in tennis play up