Flight:
If you're genuinely interested, I'd suggest starting here:
The Talk.Origins Archive: Must-Read FAQs
I agree with the above post about how impossible it is to really "get" evolution without an unreasonable amount of study. I felt like I understood it. Then I learned a little bit more and was completely lost. Then, months of reading later, I feel like I understand a lot more. I still don't understand all of it.
But that archive is a good way to get started. It's aimed at debunking creationism, but in doing so, they've accumulated a lot of great and lay-readable information.
