In your situation I would make an appointment with the nearest decent community college and talk with them. I suspect you will only need to take their placement test(s) and they should be very well versed at helping you out with any financial options available.
If community college isn’t something you feel would be suitable, then do the same with your nearest state school.
You can even google “Colleges that Meet Need” and if one of those is close by, make an appt with them and see if they have suggestions. At the very least, they could tell you what they would want as proof of foundational education.
The neat thing about community college is they’re prepared to start you where you’re ready to start. Once you’ve finished what they can offer you, then you’ll have what you need to transfer - including guidance in how to do it.
Super kudos to you for finding a path for you to head on post trauma. It’s definitely not easy with losing parents. I wish you the absolute best wishes along the way. Your parents are proud of you, I’m sure.