Biology help for Dolores, preparing for the board exam

My younger sister, Dolores, is 11 and in Form 3. Dolores loves school but biology has been a struggle since the school was closed during the pandemic. The board exam is in August. 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 San Antonio or online, for about sixteen weeks. Dolores 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 biology, you could change the course of Dolores's year. Thank you so much.