My question involves child support in the State of: Ohio

My ex and I agreed to parent our child without the involvement of the courts. We we're getting along just fine until his friend convinced him that he should "sign up" for child support (6 months later).

1) We did the paternity affidavit at the hospital

2) He requested a dna test when he went to CSEA (again at the urging of his friend)

What should we expect when we go to court?

I'm told support & visitation are seperate so will we discuss visitation at all?

He seems to be having second thoughts about the whole situation so can he "change his mind". I'm told child support is not mandatory and if we have a mutual agreement we can keep it that way, is this true?