If you are filing Mutual Consent divorce, there will be six months cooling period. There is no ristriction about both interacting with each other. In fact six month cooling period is to cool off difference and to give opportunity to change decision.
Standerd tems are included in settlement agreement. If you have any perticular term to be added, that can be done.
Standard settlement terms include about permanent alimony if any, gift exchange, property division, no claim against each other, etc.
Both of you can engage one advocate.
Fee differs from advocate to advocate, depending on their expertise, experience and other parameters.