Keeping her grades up this semester and SAT/ACT test prep should be top priorities–after dealing with any issues that brought her to your home. Get her a prep book and do practice tests at home before she takes a real test. ( I do not advise taking SAT/ACT without prep for “baseline scores” as many school counselors might recommend. If she hasn’t prepared for tests, prep first. Test in late spring through early fall. )
Depending on her/your family situation, she may want to stay close to home. Look at local colleges first. My sister-in-law recently took custody of two nieces after their junior year when their single mother died unexpectedly. One was an excellent student and ended up with a full ride at a small LAC in their home city. The other is living with another relative and attending a nearby community college.
As others have said, research financial aid for her specific situation. You may have to make phone calls to college FA offices because of her unique situation.
Most students don’t have career plans at this age. She should be getting a feeling about what subjects interest her more than others, which subjects she is best at, etc. Her high school or local community college probably offers an interest/aptitude test which might help give her some direction.