I want to learn piano.Help me

So my brother played the piano for sometime but left the home for studies and lately I listen to Tom Waits,Billy Joel,Leonard Cohen and this kind of stuff .I look at the piano getting dusty and I would love to be a able to play a song or two.I dont have money for lessons ,I am a self taught guitar player.Do any of you have any advise on how could I start learning(maybe a youtube channel or a book)???