BTW: Except in the city center and on the streets, you can build anywhere, and everyone can collaborate. If you’d like to build on your own, buy a lot with in-game coins. Then only you can place and remove bricks there.
At first I wanted to skip the buying of land for the moment and continue the tutorial. But I see step 12 is building on the land I bought.
The only other option seems to be to skip the tutorial which I don't want to do. How is this supposed to work?