Volunteer tutor needed: accounting for a motivated student in Düsseldorf

My younger sister, Jana, is 17 and in Year 10. Jana loves school but accounting has been a struggle since the school was closed during the move. 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 Düsseldorf or online, for about sixteen weeks. Jana 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 accounting, you could change the course of Jana's year. You're what makes this possible, and I'll never forget it.