You added too many steps.

For personal use of backing up othe local computer you ONLY need Veeam Agent for Windows Free. You install it and then configure your backup.

The step where you took a wrong turn was probably to also install Veeam Backup and Replication? That's basically the orchestrator, but you only need this in an enterprise environment where you have multiple servers to backup. In that scenario you can use the same Agent to backup standalone Windows Servers or Computers.

But in your case that is not needed. You install the Agenda and use just that to backup to (ideally a ReFS) disk or SMB share. I can only suggest to retry it. With ReFS and the forever incremental backups are very, very fast.