I talk a lot about the first step in coaching any client (individual, system, team, etc.) is to build a relationship, gain empathy and understanding, and then gain an idea of where/how to help initially. So, do NOT start to coach until you’ve done some relationship-building. 
But what does a coaching relationship, or a professional relationship in general, look like? What are aspects of that? Here are a few things that come to my mind—
- Making + taking the time. 
- Explaining what you do—what is Agile Coaching. 
- Building some empathy; walking in their shoes; understanding where they are coming from. 
- Meeting them where they are. 
- Listening; reflective listening; building metaphors together. 
- Connecting with their language, not yours.