I just started watching Inception...?

I've actually gotten 40 minutes into it and I am so bewildered. I'm planning on starting it over as soon as I grasp it better because it bothers me when I don't get the total statement of what I'm watching. Anyone have tips for making sense out of what they're doing? I know it's about shared dream scaping, but I am still lost. And they are using it as some type of business espionage??? Why can't it just be enjoyable without so much confusion?