The documentation for Jollyness is very extensive, but a bit difficult to follow for someone who doesn't do web stuff (I'm not even sure what to call it) full time.
In the Shop pages section,
For creating the menus, it might help to clarify that you mean Hikashop menus. It took me a while to figure out how to get there.
A video tutorial on how to create a shop might be helpful. Thank you.