Noob Item Question

[Kaliban]

I just started playing, and I'm a bit confused on what items I can equip and how to do it.

I dont seem to be able to put any of the items into the equipment slots.

I dont have a lot of items but I've got the starter sword and bought that shield from the first keep, I also have boots, a hat and some regalia. I've also tried the shield from the second keep in Arlania. All are either Human or Neutral and I'm playing a Warrior

If I right click on them in my Inventory I get the options Info or Drop. Left click does nothing and I cant drag and drop.

I've tried looking through the forums for an hour but couldnt find a similar question

Confused