Non-crit-focused builds?
First, MM is easy to start with. It is powerful enough that anyone can benefit regardless of skill level. Do it.
Second, learn DS. You do not have to be an expert to gain dps from just doing it whenever you can. It is a good habit to get into if you really want to play necro.
Third, the necro community often talks about the meta being power/critical but a lot of players experiment with a variety of builds. Necro is nice in that it can be tuned for a variety of situations and still work. Maybe that is because Necro is sub-optimal in so many.
Try things out. Start with MM and level from there. Necro is tanky enough to face-tank a little. Learn to tank for your minions with dagger on a power build switching to staff for AoE minion regeneration and conditions. DS as often as possible.
Condition:
Terrormancer (PvP)
http://gw2skills.net/editor/?fRAQNArYWjc0UcbvNm3wfbigBRyWfiuRgIU+NKA-TZRFwAAeCAK3fIxJAAaZAFHCAA
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Power:
DS Crit (PvP)
http://gw2skills.net/editor/?fRAQNBHhZakjmibbpxmGOcTULUQXnBwMEVHQdbMHVLA-TphFwAAeAAKOBAMOCAj2fIxhAYaZAA
Wellomancer (PvP)
http://en.gw2skills.net/editor/?fRAQNBHhZakjmibbpxmG+bTMMUSmCZwk3QQEdAEBjLA-TphFwAAeAAKOBAMOCAj2fIxhAYaZAA
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Bunker:
Minion Master (PvP)
http://gw2skills.net/editor/?fRAQNBHhZakhmuabqxtG2bTsLIS3aWsJHuEyAvA-TZRBwAdOCAB3focZANHCAAPAAA
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If you’re focusing on group PvE you’ll want to use a Power crit build. Most people already dislike Necros so don’t try using a Condi/Hybrid build or you’ll slow everyone down.
DS Crit (Might Stacking)
http://gw2skills.net/editor/?fRAQRBHbhG2IHNV32SjNNc4moWoguODgZIyPYEosNmDA-TBCGABB8AACZ/hAV/ZKlgEp8ThTCQZ6HA4IAQKgIGGB-e
DS Crit Spiker
http://gw2skills.net/editor/?fRAQRBHbhG2IHNV32SjNNc4moWoguODgZIqOg62YOqWA-ThBBABYt/o8DgnAgHnEg80PUp6PnpEUUARE-e
There are several variations so try them out and adjust them as you see fit.