Veeam backup architecture

Hello, I'm thinking about a backup solution. To know on physical site and in the cloud with Veeam. I intend to use Veeam backup and replication. My installation is two clustered servers with proxmox. The Veeam server will therefore be a vm. Do I have to connect a nas or san on my hypervisor access switch with enough TB to save it? And then I configure a backup to the cloud? I'm a beginner in this I've never thought about a backup solution before. Thank you