Lap one: it will feel easier than it is
The figure-8 shape means you cross back through the start and orchard area after each half-loop, which makes the whole thing feel shorter and more manageable than it is. That is exactly the trap. The technical singletrack and steep climbs do not get any easier on lap two or three, and going out too hard on fresh legs because the first pass felt fine is how people fall apart late.
Treat lap one as information, not a green light. Note where the climbs actually are, where the footing gets loose or rooty, and bank that knowledge instead of banking time.