I am not trying to be rude here. But you really need to take a beginner basic knitting class. What you are asking is very simple, and something that any knitter already knows. While we want to help, to try and give a basic knitting class here is not easy, and not the purpose of YA.
Yes, you are confused, because you don't know the basics of ordinary knitting. Once you have taken your basic lessons, this will make complete sense! While someone can show you what to do, you still would not have learnt anything from it. Please take a class!!
The directions mean exactly what they say. There is no secret code, there is nothing complicated about it. Baby booties are fun and very easy to make (and maybe boring). Simply take only the centre 24 stitches, and work them. The others are not worked -- they are not mentioned until later, so you simply forget them. All of this is covered in basic knitting classes... please take one!
When you have any knitting or crochet question, you ALWAYS go and ask at your LYS -- that is what they are for!!