It works (boots) and now I am configuring the OS from the startup menu. I have seen that you can expand the file system to the entire sd card, so part of the previous post can be done without using fdisk and another computer.
I have plugged a wireless receiver for keyboard and mouse to one of the usb plugs and it works, at least the keyboard. It consumes only 100mA, so I have decided not to use the hub.
Let’s go on.