I welcome both individual and group tuition. I have 9 years of experience in giving chemistry tuition to JC students and many of them made drastic improvement upon my guidance. Throughout my years of teaching, it is very common to see students receiving help only in JC 2.
It's never too early to start, do not procrastinate.
My advice to all students is to start tuition early. The first test you fail is a good signal you need tuition. I can guarantee you to pass your chemistry under my guidance!