A great place to start investing is through your employer-sponsored retirement account. Many companies offer employment benefits through a retirement account. In some cases, your employer may even do some degree of contribution matching. Contributing to these accounts in a way that allows you to take full advantage of the matching program is a great way to boost your investment with money above and beyond your own contributions.
If your employer does not offer a retirement account, then you may wish to speak with a personal finance professional to better understand your options and how those options align with your goals for the future.