Once you've folded all your sheets in half - you can start to construct the book. Be careful with the glue - don't run it too close to the edge or you'll end up with it glooping out the sides and everything will get very sticky!
Make sure the glue has dried before you start to stitch the sheets or your machine will get glued up. Stitch slowly and steadily so that the 'teeth' of the drop foot can feed the paper through and you can keep control of the bulk of your book. Practice with scrap paper sheets before you start on your book.
Don't forget to leave some dangling threads to add extra interest to your book.
Make sure you show us your evolving book in the Facebook forum.
When you are ready move on to .....