[Klojum]

I can't get it to start though. Can somebody walk me through how to create a new one with the correct version of mysql? I'm lost.

Perhaps the old version is still getting in the way, and is running instead.
It's not a good idea to install a newer server instance without stopping/removing the older instance.
Right now it's better to remove both of them and start from scratch with the new(er) MySQL version.

After some searching, I did find this:

cpp:
# To enable MySQL server as a service, add mysql_enable="YES" to the /etc/rc.conf file. This sysrc command will do just that:

sudo sysrc mysql_enable=yes

# Now start the MySQL server:

sudo service mysql-server start

I've never used FreeNAS so I'm not that familiar with its inner workings.