Hey, y'all

I've been wanting to get into modding for quite some while now but never got the chance but now's the time.
So here's the setup. My Girlfriend and I play on an RP Server on FiveM and she always complains how she can't find any clothes that she likes and or how she can't wear the Sons of Anarchy west (That's the Gang we both joined) that we all been wearing since joining. (And the Server owner told me the problem is apparently that the Vest is only for Male Playermodels and not for Female one. Idk if that's right if anyone got a fix for that pls let me know.)
So I thought to myself why not make her some yourself. The problem is that I'm a complete nooby and never done any Modding or shit like that.
I tried looking up some tutorials on how to make your own clothes for GTA 5 but haven't found anything helpful.
So this is where you guys come in! I'd really appreciate it if you all good leave some Tipps or Guides or anything that might help me to get started bc I have a lot of questions.
For example: What software do I use?
How can I make my own clothes?
How can I edit existing ones?
How do I get it on a Server once it's done?

Anything would be appreciated.
Thank you in advance have a Great Day!