Contact your local Open University
It is a good idea to attend a high school study counselor, the University Student Affairs Office and the management of the institutions in the meeting.
Which basic studies of the various faculties would be in a suitable format for distance learning so that a high school student could complete them with minimal physical attendance at the university.
Which courses could replace the applied and advanced courses in the high school curriculum so that the student would receive credits for completing them at university.
Collaboration with Open Universities is fruitful because it has a clear gateway to universities, as faculties do not directly provide teaching for non-university students. The Open University is the best option, since all supply, marketing and co-ordination of education and administration are in one place, instead of different faculties.