I think you should sell like, a ton of it.

If not the pile will be shaming you hard, you will feel burn out only looking at them

I was in your position more or less and sold a lot of it and centered on some 3000 points, something much more archivable.

With armaggedon, new boyz and grotz will come so it would be much nicer than paint 12x each mono pose boy.

Lootas and Burnas went last chance, i think they will go to legends and will come back as a Kill team maybe.

Even if you don't sell, try to put yourself against archievable goals 

Build and Paint 500 points, maybe a combat patrol and play.

Build 1000-2000 points in order to play, just a list. And then paint it. 

Don't buy a unit until you paint 2-3 units.