Upgrading from 13.10 to 14.04

[dh]

I would like to upgrade to the new Xubuntu 14.04 version that has been released.

I am a newcomer to Ubuntu and Xubuntu and don't know many procedures yet, so please help me out.

I want to upgrade from Xubuntu 13.10 to  Xubuntu 14.04, without destroying or moving a lot of code in /usr/src, etc.

Can apt-get be used for the op-sys upgrade without destroying my current data in /home/uername ?

Please advise.

Thank you.