Your swing path sounds fairly straight but with an open clubface at the moment of impact. Get a pro to check out the alignment of your shoulders. I would be they are pointed to the left of the target causing the swing path to be across the ball with an open clubface. Square up your shoulders, take a full shoulder turn, keep your elbows close together throughout the swing. Roll the left thumb to straight down the grip reminder line on the grip.
Grip pressure is more important.
Firm, but not tight with the last 3 fingers of the left hand and everything else is pretty light pressure. Try practicing with a glove or hankerchief under the left arm pit while you hit fairly full wedges. Unfortunately, sometimes I overwork it or I draw when I'm trying to fade. This opens the window for error significantly. Working the ball should only be for situational shots.