While your enthusiasm is appreciated, the COS doesn't need assistance in advancing itself. We don't advertise, conduct gatherings for the purpose of recruiting or any of the things associated with white light groups and churches.
Instead, advance yourself
. Become the best you can be within the goals and parameters you have set for yourself. Strive towards positive achievements.
If, down the road, membership is something you desire, you will find the way to come up with the fee. Even if it takes a few years of setting aside $5.00 or $10.00 every month. Or when you embark in your career, and you can afford to spend $200.00.
If you haven't done so, read the essays at the Church of Satan
website. This will provide an idea of how Satanism and Satanists interact with the world.