You get only one run through this life, so I don't think you are too old to change careers. You have only to look within yourself, and decide whether you really want to do a pilot's work, or whether you are merely thinking that the grass is greener on that side of the fence. Soloing even a light single is a great experience, as is flight in general. Don't generalize that feeling to proffesional flying, without doing a little research.
There are numerous sites out there, other than this one, with many threads by both career pilots and wannabes. You should spend some time looking at the experiences of others before you decide to jump. If you realize and are willing to accept the risks and the challenge, and you can afford the inevitable drop in income, then go for it.