Make sure that your invitation has clear directions and timings for your event. Also be ready to start receiving guests at the time you set. A simple gesture of offering them a seat and glass of water to wait while others arrive is enough. Maybe offer them the wi-fi code if you have one.
Some guests may want a conversation while others arrive and others are fine waiting silently on their phones because they may not be as extroverted. Be sensitive to that so your guests don’t feel either isolated or smothered.