You have to ask what Ceph will solve for you. Scalable, failure ....
If you decide to use Ceph in my short experience and other people suggestions:
1. Get fast network as possible. Network latency have big role.
2. Get SSD/NVME enterprise grade...
What you need to do is to create missing config files.
To get all keys use this: # ceph -n mon. --keyring /var/lib/ceph/mon/ceph-pvecloud01/keyring auth ls
1. Create /etc/pve/ceph.conf and put needed info
2. Link the file: # ln -s...