I've done a couple of projects using entalac. It is very hard to understand, but once you've been through one repeat of the pattern, it's actually pretty easy. Once I got into it and watched the square take shape, it seemed sort of magical.
Anyway, this is the pattern I used first, for a square for a crazy-quilt afghan I was making. All I can say is just take one row at a time, don't try to understand the whole thing, and as Ingrid tells us, "trust the pattern."