Computer science help for Tiffany, preparing for the university entrance exam

My younger sister, Tiffany, is 17 and in Grade 11. Tiffany loves school but computer science has been a struggle since the school was closed during the strikes. The university entrance exam is in October. We can't afford a private tutor, and the school's free sessions are full. We're looking for a volunteer who could spend an hour or two a week, in person in Dallas or online, for about twelve weeks. Tiffany is polite, hardworking and eager. We have a quiet space and a laptop for online sessions. I'll always be at home for in-person sessions. If you're a teacher, student or professional who feels comfortable in computer science, you could change the course of Tiffany's year. I never thought I'd be the one asking, and I'm grateful for every bit of support.