Yes. If your goal is to make a living investing in stocks, a good time to invest in stocks is as soon as possible. The younger you are, the more time you have to let stock prices increase before you cash in.
Even so, no one expects you to know how to invest in stocks without knowledge. You'll need to learn how to invest in stocks and make money. To get started, take steps like setting an investing budget, understanding key terms and concepts -- like stock type orders and limits -- and seeking solid investment advice before diving in.