It is a confusing area. One thing I wonder about is if I have to consume alpha-linoic acid and linoic acid, or if derivatives will do.
And no, I’m not going to eat fish. 
You don’t need to eat fish to get EFA’s. There are plenty of vegetable and grain sources.
This is a great page from a vegan website.
I know very little about supplements, I prefer to get nutrients from food, so I’ll leave that to someone else.
I take two of the Atkins Essential Oils softgels daily.