It doesn’t matter how old you are its never to late to learn how to play the piano.
The most important thing is to have fun while you are doing it. A good way to get started is to pick a song, one you know well. Because you know how the song sounds it really makes it a lot easier, and once you have one song under your belt your confidence will grow and you will be more motivated.
Playing the piano can also make you feel good although in the initial stages there is a bit of a learning curve but like most things the more you play and become familiar the greater the rewards.
A good thing to remember, if you learn the piano or not in a years time you are going to be a year older anyway.