I have already “dedicated my soul” to Satanand I’m wondering if I can take it further?

Read the joyofsatan.org in its entirety. And the sermons. There is no "selling of the soul". It's about personal development and spiritual alchemy.

There is no buying and selling of souls here but there is soul stealing going on in the world by the jews and their superiors. We liberate people's souls and humanity. Study our knowledge and you will understand everything.