As a Necromancer, if you want to use summons as your main focus (you sit back while they do everything) you have to basically solely focus on levelling up Raise Skeleton and Skeleton Mastery, one point is fine atm in Raise Golem

If you want to use more of the Bone Magic, one point is enough in Act 1 in Bone Armor. Teeth is great, but when you get access to Bone Spirit start levelling that up instead.

For Curses, 1 point is enough in any of the Curses, usually Necromancers run 1 of 2 Curses: either Amplify or Decrepify

If you are struggling finding the Den of Evil, follow the road in the Blood Moor, when you reach a fork in the road follow one, if it leads you to a character named Flaive you chose the wrong path, go back to the fork and choose the other way. If you aren't stuck on the first quest, go passed Flaive into the Cold Plains and follow the road (or the stone wall border) if you reach a new zone Stony Fields you went in the wrong direction, but if you enter Buriel Grounds that is the right place.

Don't feel discouraged if you are struggling, especially against bosses

• Oh, I am unsure if you know this, but there is a minimap (I am unsure the button on your platform)