Just because you are surrounded by young successful people already: running businesses, earning lots of money, travelling a lot, and those who have their passion and goals mapped out, DO NOT WORRY.
You’re young. You still have a lot of challenges to face and loads of things to learn. You need not to hurry. You need not to rush into things and decisions. Rushing will only make you miserable. Take things slow. One step at a time. Savor every experience. Learn on your mistakes.
Lastly, here are some things you should always bear in mind: Breathe. Plan. Write. Do. If in doubt, stop.