16 year old A-level student offering online help with primary and secondary school Spanish, chemistry and biology

I have just finished my GCSE exams and am going on to study Biology, Chemistry and Spanish A-levels. I would like to offer online tutoring for these subjects for any primary or secondary school student struggling with any part of the course, or needing a leg-up before exams. I want to make learning easier by discovering what techniques work best for each individual student, and developing lessons which are engaging and helpful.