A person learns throughout their life. Some people like learning just by living life from day to day, some people prefer actually getting out in the world and exploring the environment around them. Some people like doing academic learning, and learning about life that way.
We all have different ways of learning and discovering, but in my opinion, the best way to learn and discover is to get out there and do things, or if you can't, use the internet to connect to the world around you. With the internet nowadays, a person has the world at their fingertips! Go and use it! And while you're learning, you might discover that you have a passion for something. And that's the time to grab opportunity with both hands.
Sometimes it is scary if you're starting something new, and you don't know whether you're going to make it, or if you're going to crash. One rule regarding that is don't take on more than you feel you can handle. If you can handle what you've been given, you can try taking on a bit more. Don't try and dive into the deep end, because you will crash if you can't handle what you've been given.
And always have a backup plan, because if Plan A fails, you're going to need a Plan B. Prepare in advance for 'in case'. Some things hit you very suddenly, but there are some things that might have been coming for awhile that you refused to see and refused to plan for. And if you've had the hindsight to prepare, then nothing should stop you from living life if something does happen on the way.
And don't ever think that you don't have control over your life. You have quite a bit of control, so use it...and wisely. ; )