starting a necro
Necromancer has a lot of good builds, it really comes down to play style. The main builds are Condition (damage)/Power/Hybrid/Minions. Every necro build will have a lot of conditions, even power builds will be dropping quite a few conditions down, just not for damage.
I suggest you start with a condition build. It is the most accessible build we have. As for gear/stats/build, look up Nemesis’ tutorials, he should be able to help a lot.
Necromancer can be frustrating when leveling; especially for players used to higher dps. Fortunately, minions have been improved which should help that a little. The play style is different and many players are unsatisfied with it but the profession can be very tanky so expect to use Death Shroud, dodge, heal, and face-tank while whittling down a mob’s HP. There is no “nuke” button to finish fights quickly, which is a turn-off for many. Playing Necromancer takes some skill and a lot of consideration for traits because of all the options Bhawb mentioned but there is challenge, there, which is why I like the profession.