Wow, that's gonna be a really tough picture to extract because your background varies from dark to bright, and so does the subject, in many different combinations.
Yes, check the tutorials. You've got a fairly steep learning curve ahead. You will probably need to make three or four different masks optimized for various parts of the images, then combine them. Plan to some manual painting on the masks as well.
Although Refine Edge is pretty cool, there are some third party tools like OnOne's Mask Pro that are even better but unfortunately not especially intuitive. You can download functional trial versions, methinks. Watch the manufacturers' demo videos, those can help.
