DFSR is actually relatively easy to setup.
There’s no need for me to re-invent the wheel or explain in tiny detail, as most of it has all been done before.
So, to start
MS blog about how it can work for you.
DFS Replication in Windows Server 2012 R2
How to set it up
Another MS blog about how if you have a huge estate, you better use DFSRADMIN command line! (Yeah you’d better!)
DFS Replication and command line