Paddle angle - by: Out there living

Hi guys
new to site and new to ski paddling, come from a racing sup background and I’m loving ski paddling.  I’m wanting to make sure I’m gettting my technique right however I’m getting conflicting view from everywhere as to my paddle angle
from new was told to keep at 0 angle however I’m also told I should be on at least 30 degree angle
what is correct and what is the benefit

thanks in advance