So we send starship to Mars. Then what's next?

So what happens when we send starship to Mars and land. I mean obviously the first ship or ships, won't be manned but what are the first steps after landing? What supplies will be sent first? Will fuel production and ice mining be priorities or will building a landing pad be first? Not many people are talking about how things will be built on Mars. The Angry astronaut has a video talking about landing on Mars and the challenges or a ship lifting off again and how a smaller ship inside of starship would be the best option. I am curious if anyone has any idea of what Space-X plans or ideas are for what to do after landing. I used to play a PC game called Surviving Mars and in the game you would need to get fuel production, oxygen production, food and habitats. It was a great game for those who have not played it.

Edit. So I understand more ships will be sent, but how will they unload the cargo? How will these ships land upright without a catch tower? Will robots unload the ships or people? If robots will do it, then shouldn't the robots be in the design stages at this moment? What do they look like, and are there videos and articles detailing the progress of the design of these robots? I've only seen robots that were 3d printing houses or habitats, but that's it. What will the Mars rovers look like? I'm curious how the building will start, which is basically what I'm asking.