Starting from scratch?

So I did a few searches and the consensus I get is that instead of starting from scratch for a new skin.... That is should start this conq. And basically mod it to what I want... I just want to know is that the right mind set?

I enjoy modding and want to take a swing at making my own skin that's the reason for this post. Not trying to start a conflict as I have searched for this I have seen it be taken that way.

Thanks for advice