ssh - Install a GUI on my Ubuntu Server VM

I know that this question is already asked but I still have an issue.
I am using a ssh to connect to a virtual machine via this command:

ssh -X 

Of course we can only work with a terminal. Therefore I am trying to install a GUI.
I did:

sudo apt-get ubuntu-desktop

or

sudo apt-get mate-desktop

So I disconnect and connect again to the VM with ssh and still with the prompt command. How could I start with the GUI.

Then I install a XRDP like my teacher told me. But I still don't have any GUI.
However, when I just launch firefox it appears.

What can I do ?

Thanks

I fixed it like this:

echo “xfce4-session” > ~/.xsession
# /etc/init.d/xrdp start

follow this tutorial.