Editing Vanilla NPC with Creation Kit

EDIT: SOLVED!!

I apologize if this is a repeat post within this subreddit- if it is, then I couldn't already find the preexisting post. I'm fairly new to Skyrim modding and using Creation Kit, all I've managed to do in it so far is create my own follower (finally successful after 3 tries).

What I need help with: Currently, my main objective is to find a child NPC (like Lucia) and edit their hair color to match my Dragonborn's (maybe even eyecolor, if I'm feeling ambitious). To start off, I selected an NPC I could care less about that was in the town my DB is in-- Riften. I chose Haelga and changed her hair from blonde to black, hit okay, re-entered and hit ALT-F4, saved the .esp and loaded it through creations in-game. Loaded in, went to Haelga; her hair was still blonde. Not sure if I'm missing a step, or doing something wrong. No matter where I look someone is asking the same question- but its for a modded character where they need SSE edit or something else. I'm at a loss. I'm trying to avoid downloading new programs to change the characters when it seems somewhat simpler to do it within CK.

TL;DR: Trying to change vanilla NPC hair color but I can't figure it out. pls help

SOLUTION:

1) Enter Creation Kit

2) Load the skyrim data

2) Open NPC actor file

3) Editing their hair through the character gen parts tab

4) Click OK

5) Save the mod

6) Exit and re-load the CK.

7) Re-loaded the mod. (Make sure to set the mod as active file)

8) Find NPC under Actors, select it and hit Ctrl-F4

9) Save again.

10) Enable mod in Vortex and play