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Half Life 2 - Combine Advisor

Ok nvm. I think I found my problem. I didn't properly change the name.

I'm having an issue. The mod I modified isnt showing up in advisor list.

Am I supposed to also modify the asset file or just the vo folder?

"Do I just replace stuff using your mods as a base and writing over it?"
Exactly like You said, there's no tool (as far as I know) dedicated to make mods in paradox games. You can find local version of downloaded mods in
[your driver]\SteamLibrary\steamapps\workshop\content\281990\[mod ID]

281990 stands for stellaris app ID, I'm not sure what ID of my mod (because I don't have stellaris installed rn) but probably it's 1708774548

also I used this wiki as guide
https://stellaris.paradoxwikis.com/Mods

How exactly do I use your mod as a template? Do I just replace stuff using your mods as a base and writing over it? I'm more use to modding with mod tools like skyrim creation kit for example.

Unfortunately not but if You really want to make your own mod then download my advisor and use it as template, advisors are actually very easy to make just experiment with it and You will eventaully make one, my mod for example was purely made by trail and error.
Though most frustrating thing is making voicelines, you have to extract and modify them from somewhere (or record your own) and if you want to make superb mod there should be more than one voiceline for specific action.
If You still have questions I will be more than happy to answer them all :)

Do you have a modding tutorial for making your own advisor mod?

Works with every version of game even if game says that "mod is outdated"

This works with 3.9 game version?

Thanks for the follow-up and no worries! It works perfectly for me now