Any good sources to help me with Spinoza's "Ethics"?

I just bought the book and tried to start reading it. I got lost on page 1 and after 2 or 3 pages I had to stop. I’m not able to follow his writing style… or at the least, I’m not seeing where he’s starting from. Do you know a good source/website which I can use as a springboard? I have a feeling once I get used to his style, I’ll be okay.