Being nervous is okay, I think all students are. It will pass as time goes on. Books are super expensive, I have found that ebay, half.com, and amazon are amazing at helping cut the costs. Also you can usually get away with buying 1 edition behind and save tons of money this way. Just look at a classmates book and match up the chapters. The books dont change that much from 1 editon to the next. I havent run into any problems doing this yet, you cut your cost by 50 - 75 percent this way. I have gotten books for as low as $3.00.