An advanced beginner certainly can do the bargello, I just recently did a twisted one and it was pretty simple. I do advise you get the book. Especially if you are a beginner. It has a lot of tips etc in it.
They are basically done in strips, so you cut the strips, sew the strips, cut the strips, reorganize some of them to make the pattern, sewing them in strips helps keep them in order. making it easier to follow the chart in the book.