DIY Installing New Electrical Circuits

We are rearranging the electrical on the end wall of our 2001 Fleetwood mobile home. I found the conductor that brings power from the breaker box. Now, I want to split that into 3 powered conductors and extend its reach about 2 feet. These 3 new circuits will power an outlet, fan, and repositioned vanity lighting fixture. Once you know where the wires get connected, the rest is easy.