I’m new so it be just be something entirely my fault but when I’m trying to play as a necromancer the sub class won’t appear in my list of options when I try to pick it. In fact nothing but the school of evocation will appear.

Have you purchased it?

If no, are you making the character in a campaign where somebody has a Master Tier sub and is content sharing while they or another has bought the subclass?

 - Yes: raise a support ticket (contact us link at bottom of page)
 - No: buy it or enter a campaign where it can be shared,

It's not free while Evocation is. So unless you buy it or have it shared with you it wont be selectable.

thanks so much I didn’t even think about that.