As jay Mentioned, The School of Bonsai and North Rocks, is Good.
We run a Program of lessons that take a novice thru to advanced Skills in a Classroom setting
You will learn all about Trees and their care, Techniques of how to create and maintain Bonsai.
The Full "course" runs over 3 years and the first 2 are 1hr Demo / Lesson, and then a Workshop where you are encouraged to work on your own trees
You can enter the "Program" at any stage if your existing skills are appropriate, bot most people start at the "beginners" class ad then progress. Even people that this they are "Too advanced" fro the beginners classes, have after a few weeks decided to go and start again as they realised the skills learnt in the initial terms are important. Even so called Skilled artists would benefit from these classes.
ps, come along to the Schools annual show, next weekend, and see the trees that our Members produce
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Ken