Honestly man, if you already admit you don’t have any business sense.
Please don’t start a business, your going to blow through the cash trying to make it work and be in the same spot.
You’re best bet is to take some of that inheritance, pay off the car, get your bills current and go to college/tradeschool.
I’m biased, i would recommend accounting. Public accounting (audit and tax preparation work) will start you at 60k/yr at most firms. 6 figures is possible within 5 YOE if you get your CPA license.
If you can add, subtract, multiple, divide you can be an accountant.
Won’t make you filthy rich but I’m living well.
I know this isn’t the answer you wanted to hear, but getting a lump sum of inheritance doesn’t mean you can run a business.
Plenty of rich kids go broke after their parents kick the bucket.
Scare tactic.
If she does just show up with proof it got delivered to her address.