I agree, get rid of that book! It is completely natural to be feeling anxious and overwhelmed. If you're worried about your nutriticion, see a gp or a health specialist if you want.
There are so many things on the market for babies, a lot of it is a waste of time and money. Start off with the necessities like clothing (00000, 0000, 000 sizes to begin with), wraps, sheets, blankets, nappies, wipes singlets and socks. You may want to invest in a bouncer/rocker, or even maybe a sling/wrap, but that's totally up to you. Prams you can get cheap from Ebay, garage sales, private sales etc. Babies don't need much.
Huge