Using Dublin Core fields with our existing fields

I’ve had several attempts to import (via the excellent CSV plugin) my spreadsheet. But I’m still struggling with how to address some of our specific fields.

Below are our fields (slightly massaged to be easier to import):

Asset Number = DC Identifier
Asset Location (this is the physical location of the item in our library - most important bit)
Level = Tags
State Sub-level = Tags
Category = Collections
Short Title = DC Subject
Description = DC Description
Season (peculiar to Sth Hemisphere cricket - season July - June e.g 1930/31, 1988/89 etc)
Date = DC Date (sort of)
Condition
Date Catalogued
Image (I’m hoping the importer somehow does images - haven’t got there yet)
Image Link (redundant if the image importer works)
Additional Comment (e.g. donated by)

It’s the bolded fields I’m struggling with. I feel that I’m close to cracking this, but I’m not sure if I’m missing the point or something.

Thanks!

I’ll kind of answer my own question. I don’t know whether it’s not a satisfactory solution (archivist-wise).
I’ve created an Item Type for my particular organisation that includes the fields I require. Into that Item Type, I’ve added some existing and newly created fields.
I’m just about to attempt an import, so fingers crossed!