I'm learning to use Maya as part of a University course (I'm very new to it) and one of my assignments is to model a door of my choosing, I found a picture of a castle door which seemed good for modelling, I've messed around a bit modelling some parts of the door but don't know how to do it properly. I was just wondering if I could get some advice about how to go about modelling and texturing the door properly, any help would be much appreciated.
Here's the picture I'm planning to use:

and here's the things I've modeled so far:

Thanks