Hi. And welcome.
I think you have most of the right idea.
For decreases I would use k2tog or SSK depending on which side you're on. These videos will show you which way they lean http://www.knittinghelp.com/videos/decreases
That last section would be to decrease on every other row for 23 rows.
Ending on the ws would, I think means to have that row facing you to knit and cast off from that side.
I hope that makes sense, and very likely one of the more experienced knitters will chime in with their interpretation. I can usually follow a pattern, but they can be written in such a confusing way that we need a few more sets of eyes to try to interpret them.