How are jurors picked for a felony trial in ohio?

I have some understanding of the system but would like more info. I know there are 12 jurors with one alternate. Correct? Does the prosecutor pick six and the defending attorney pick six? Do they both have to agree on the others choices? Also would like to know if all jurors have to agree or if half of them say guilty and the other half not guilty what happens then? Do they have to convince the other half to change their minds? Or what if only one says not guilty?