Wish to coparent with gay sperm donor

I have no physical preferences around relationship status, ethnicity, height, build, eye/hair colour etc, though as an agnostic/atheist, I would prefer someone for whom religion does not play a big part in their life.

Whilst I have no children I would be happy to coparent with someone who already has a child, but preferably not with somebody who has been or intends to be a donor.