It is never too late to make a career change. Some of the most successful business people have started their careers at a later time in their lives.. If you want to make a career change, my first piece of advice would be for you to research the career you want to have as much as possible, and start out slowly..
Today, there are hundreds of people starting their own careers everyday, and although it is easy, you also have to compete against a lot of people. So, start out slow and take things from there.