After building Bitcoin private, you should have two binaries (btcpd, and btcp-cli) on your build target directory, but before running the btcp, you need to configure it:
The rpc parameters are required for the daemon to run. the `testnet=1` tells the daemon to connect to testnet, and `addnode=...` is to connect to a reliable node. This is a temporal until we add dns seeds.
Once you run the daemon, you should first wait to sync the chain before mining. Once you are synced you can add `gen=1` to the conf file, and restart the btcp daemon.