Oh man, I have to disagree. I love the Ainulindalë. Plus, without it, I imagine you'd have a difficult time figuring out who exactly the Valar are or what their role is.

That said, my advice would be to not get too caught up on the names and places and details — just let the story sort of wash over you. Many, many, many names are only said exactly once in The Silmarillion; if you try to remember them all, you'll go crazy. If you see a name 3+ times, that's when it's time to track them down on the family tree, probably.

I'd also recommend making sure you reference the map when a place keeps being mentioned. It's helpful to know the vague locations of Doriath, Nargothrond, Gondolin, etc.