You can look at it another way being an act of good.
You captured and binded the Chaotic Evil spirit of the strongest and most cunning member of an Orc tribe blessed by Gruumsh after lying to it, which you will be able to summon thrice to obey your commands, that can include all the good deeds...
It's not necessarily evil to me. If you prefer to remain Chaotic Evil Alignment, you could also very well be.
But if you don't get the chance to play evil character too often like in many campaigns and can with this short one, you may very well take the opportunity and embrace your Zentharim...
If the Skeleton familiar forces a creature to make a saving throw, it uses your spell save DC, which Net do.
RAW on paper perhaps but i don't know if it's RAI.
YMMV depending how DM ruling goes.
My wild take on 6E is that it will be highly modular for chargen;
Choose 2 Ability Score Increase
Choose 2 Species Trait
Choose 2 Class Feature
Choose 2 Saving Throw Proficiency
Choose 2 Language Proficiency
Choose 3 Armor Proficiency
Choose 3 Weapon Proficiency
Choose 2 Skill Proficiency...
I have the following houserules pertaining to Dying to keep other players on guessing how close to dead one is or make it more gritty and impactful against yoyoing, urging them to heal each other before dropping to 0 HP rather than after.
Lone Death. Death Saving Throws are rolled in private so...
I usually start campaign at 1st-level but it often is level 3 or higher more rarely so.
Reasons is i prefer party to grow together from the beginning as they take shape.
But some game start higher power-wise as a choice or because it has a defined parameters ex. Level 3-12 etc...