Iksar is the best race for Necromancers, but you won't be able to create one for awhile. Second best is obviously Erudites for their high int and also this quest:
http://lucy.allakhazam.com/item.html?id=7105
Playing one will be a bit tough, you'll be stuck soloing in Tox Forest for 8 levels until you can get Gather Shadows (if you're kos in Erudin like live), unless you find an enchanter to invis you through Erudin (they get invis at 4). You should be fine in Qeynos (again, based on live experience. Faction might be different here), just get a bind and stay away from cleric/paladin guilds.