Spinoza was fun, but I remember him being rather confusing. He was also more into politics than purely religion, if I remember right.

Spinoza is a wonderful philosopher, if you don't read him directly as a first approach. His formatting is weird, and doesn't quite follow a through line. Reading philosophers who have read all of Spinoza and can write about the key concepts, or how they are present through his work is a much better way to get to know him.

My recommendation to get started is Arne Naess' writings on Spinoza and Ecology.