1. The DNS to set them for my domain
It is always in the same cPanel:
cPanel => Domains => your domain name => DNS
shortly, it is
dns1.m6.net
dns2.m6.net
dns3.m6.net

2. The "hostname" to update the Wordpress version.
Usually it is "localhost"
If doesn't work properly, use your domain as a hostname

Than you

alex
admin
naturemethod