I agree the interface was not intuitive to learn, but once you decide if you like the regular or condensed keyboard (if playing PC version) and get it down, it flows really smoothly after.
If you can, spend you first few days in game running around and doing light exp but talking to NPCs and just getting used to all the different controls. I find the sooner a person gets used to them the happier they tend to be playing.
Now I only have problems if I'm flipping alot between FFXI and Oblivion or other games with different interfaces because the movement controls I use for the two games are very different. It's funny to come back to FFXI and run at something then expect to jump until I remember I can't jump anymore...