[B_part]

1)The name is Seyda Neen.
As to the ghost, and ghosts in general, they can be hit only by a silver or more powerful weapon (=dwemer, ebony, daedric). Enchantments will also deal damage (this means that if you have a nordic broadsword, which is made of steel, enchanted with fire damage, only the fire will deal damage).
The same thing goes for arrows or darts or any other markmanship weapon.
General tip: ghosts tend to damage your attributes (although usually only for a short time), so carry some restore attributes potions with you if you don't have the corresponding spells.

Character: if you want to play a warrior, choose nord, orc or redguard, according to what skills you prefer (each race has bonus on certain skills). I like Redguards very much, because I love the Adrenaline Rush power. Yet, it is a matter of taste and skill choice

Armor: depends on whether you prefer light, medium or heavy armor, but since you are playing a warrior type, I assume you like the heavy stuff. So, ranging from worst to best, there are: iron, steel, silver, trollbone, dwemer, ebony, daedric (see below the image), unique items.
Should you prefer light armor, the rankings are: nordic fur, netch leather, chitin, domina armor (official plugin from Bethesda, armor for women charachters only), glass, unique items.
I am not proficient with medium armor, but from the looting I have done, orcish armor should be the best.
Early in the game you get steel and chitin (or domina, which is on sale and not terribly expensive)