I would ignore milestones and focus on helping them and you be in the "flow" as much as possible while physically together, and do your best to help to remove b

I would ignore milestones and focus on helping them and you be in the "flow" as much as possible while physically together, and do your best to help to remove blockers as they present themselves. Just like you can't realistically estimate any engineering project, focusing on strict milestone delivery dates is focusing on the wrong part of the human development lifecycle.