New mod?

I just started working today on a mod that is intended to increase the overall value of capital ships for those of us who want this sort of thing.  I've been getting steadily more ambitious all day and am thinking about coming up with some way to implement "uber" capital ships: for example a giant ship that there can be only one of, requires very high fleet cap, costs a ton, and will generally be very expensive to build.  (To note, I am trying to come up with something balanced, not just trying to jack up the stats on capital ships so that they crush everything).  Problem is that some of the stuff I want to try I have no idea how to do and probably cant.  For instance I kinda would want a new look for the "uber" ship for each race (should such an idea actually be implimented) but dont possess the skills or the software to create such a thing, let alone implement it.  I guess this is a lot for someone whos never done anything more than mess with the basic text files of a game to try but nevertheless I'd like to give it a shot.  If theres anyone who would be able to help whether its just telling me how to do something or actually making something for the mod let me know, I'd love to hear from you.  Again, not sure if this is something I'm willing to undertake since it would be a fairly serious endeavor but I'd like to see if its possible.