Separation Agreement, Alimony, Child Support

My wife and I want to go the uncontested divorce route. We own a home and have two minor children.

We've agreed I will remain in the house and she will eventually move out.

Our question for the separation agreement is the calculations for alimony and child support.

We want the separation agreement in place asap but also want to do it without having lawyers get involved until it's time to finalize. Any recommendations?