Is it easy to upgrade my fedora?
NO or yes , depending on how you define "easy"
The current fedora 18 ( soon to be 19 ) is VERY VERY different than fedora 14
there is no real way to upgrade
You need to do a new clean install of Fedora 18
also so many things have changed ( like the default database ,it is now "mariaDB" and not MySQL )
firefox is now ff 21
the nividia driver ( if you have a nvidia card) uses the nouveau kernel mod by default
that most of the config files and database files in your home folder will not port to the new fedora
you will need to manually reinput most of the data
then see the fedora 15 & 16 & 17 & 18 change logs