Shall I?

Shall I delay my main-project?
As noone knows, I'm thinking about my main-project at the moment. I don't wanna explain it to myself again right now, but it's about Discord's mind, his past and the reasons why he actually is a god of chaos and disharmony. I planned it to be a wide story, containing some philosophical stuff. However, in the last days I saw that it is WAY bigger than I thought. The main problem here is that a main-character is going to be OC (..and not, in some ways..). At the beginning I didn't saw a big problem there, because there is a connection between that OC and already known characters. But the fact that OC's aren't..well..beloved by the community did change that.
Of course, the problem here is not that it would be problematic to publish a first story containing an OC as a main-char. The problem is WHY they aren't ..beloved. Known characters already have, well, character. There is a way they're acting, there are ways they're thinking. New characters don't have anything. They are new. If I wanna make one, it's my DUTY to make him (or her) believable. To give him (or her) a living soul. Maybe I'm just overthinking this, but it feels like adding a new dimension to my story.
Well, now you could simply say, "delete him! Y U NO use a common pony?".
That's simple to answer. As hard it is to handle the new dimension, my story is too complicated to be shown without it. I need dat OC.

Thanks to my shattered soul, I'm an optimistic being. I think that I could become a better writer with more practice.
So..yea, here's the idea that I have. Since there are more ideas in my head, ideas which aren't that complicated, I could start write them down.
Write some easier stories, comedy, shipping, mini-epics, whatever. To gain practice, become better and finally handle that big, meanie story I'm working at right now (which I TOTALLY WANNA WRITE!!oneeleven!).

But first I shall try to get Pinkie Pie outta my blog.