It's not that simple.
You'll need to run rsync on both ends of the connection, and DA has no access to your other system.
And since most of us want to keep multiple versions of backups and not just one, we'll need to run something on the other end to make sure we don't rsync over our only copy.
There's really no shortcut to learning how to be a systems administrator.
Except perhaps work as a reseller and pay your provider to do the work for you.
Jeff