Action
Establish balanced working and communication patterns with your boss, who is the key relationship and hub of influence for your work. Use formal and planned interactions initially until you and your boss build a rapport and share an understanding about how you work together. Involve your boss in key planning and decisions to draw out what you hold in common or and differences that need be managed.
Risks/Opportunities/Surprises
People sometimes wait for the boss to take the initiative. This can send the wrong message, eg. You're a loner or you don't value your boss' input.
A fear people sometimes have is that they don't want to appear needy. This can stop them seeking feedback from their boss. This feedback is important to help align expectations, priorities, effort and results.