DE10 Nano problems with linux OS

Good day.

I recently bought the DE10 nano. When I connect it to the HDMI screen and start linux. I have some problems and doubts.

--I can not change the resolution of the screen, it has a default one that automatically configures but not all the monitors are adjusted properly.

- The Linux distribution does not shut down or restart, . I had to remove the power supply to turn it off.

-Only has a port to use or a keyboard or a mouse. Is it possible to use a USB hub with external power to use both (mouse and keyboard) at the same time ?.

-Is there any manual on Linux OS?

Thanks in advance for the support.