Do some financial planning. Understand your own budget. Know how much money you can spare each month, and plan investments based on that. Decide where to invest. Mutual funds often are a good starting point.
Mutual funds are investment companies that place the shareholder's money in a wide range of stocks.
The risk is significantly lower because the failure of one company can be overridden by the success of others. Go to the library and get a list of names and performance records of the investment opportunities you are most interested in. Start your investment soon. By starting early, you won't have to invest as much each term to reach your goal. Investing should be considered a long-term undertaking.