Seeking advice on technique

I have been surfing for 2 years on weekly basis. East coast, beach break. Working on bottom turn and angled takeoff to go down the line. From the video, I can see a few problems:
1. Looking down at the board THEN look down the line
2. Timing is off. Pop up late, already at the bottom of the wave face when the board is finally turned
3. Posture is off, rigid, but don't' know where is wrong/How to improve
Welcome any comments on what to work on next step
https://youtu.be/XWP-HwYCu_Y
1. Looking down at the board THEN look down the line
2. Timing is off. Pop up late, already at the bottom of the wave face when the board is finally turned
3. Posture is off, rigid, but don't' know where is wrong/How to improve
Welcome any comments on what to work on next step
https://youtu.be/XWP-HwYCu_Y