Key skill? Riding steep stuff.
Anything else tricky (drops, jumps, corners, roots etc) you can ride round, mince over or stop in front of. If the hill’s steep, it’s steep! No avoiding it.
Start with short steep sections you can be confident letting go a bit on, and work up to longer prolonged sections of steepness.
Having said that, there’s nothing super-steep at any of the places mentioned on this thread I don’t think, but some places e.g. inners, might seem steep if you’re not used to it. (there is some very steep stuff at inners, but it’s a bit off the beaten track and most don’t ride it)