On your local network you won't necessarily need to use DNS to access the Pi via a different host name. The
.local domain, has been officially reserved as a Special-Use Domain Name (SUDN) specifically for the purpose of internal network usage. This way your custom local names don't conflict with existing external addresses.
This will require a service discovery process running on a local network via the mDNS/DNS-SD protocol suite. This could quite possibly already be running on your home router. If not you can install Apple's popular 'Bonjour' local network discovery service either on a Mac or on a windows machine. Of course you could always install it on the Pi as 'Avahi' using
sudo apt-get install avahi-daemon
However, lets assume that there is a mDNS service already running, so straight out of the box the Pi should be able to be accessed using the host name
raspberrypi. Because it is on your local network you would use
Therefore from your PC you would access it using;
To change the host name for the Pi you can either edit
/etc/hostname using sudo and nano, changing 'raspberrypi' for a name of your choice (then reboot for it to take effect);
sudo nano /etc/hostname
sudo nano /etc/hosts
... or you can do it via
sudo raspi-config where you first select 'Network options' and then 'Hostname'.