Who has priority?

You are correct in selecting yourself as having priority. The yellow diamond sign means you are on a priority road. The additional sign below it indicates the priority road curves to the left, matching your direction. Both the red car and the green tractor must yield as they are coming from side roads and do not have the priority sign. In situations like this, always follow the direction of the priority road and watch for vehicles coming from non-priority roads—they must yield to you.