I went through the same thing, because I have many interests. Some helpful advice from my previous career counselor was to think of your top two or three interests and then separately two or three things you are good at. Then decide do you want to do something that you are naturally good at that isn't necessarily your dream job, but fulfilling because you can do it well or if you want to do something that greatly interests you, but you would have to work really hard to develop your skill. Also the word career doesn't mean you need to have one job forever. For example presidents usually have a long career doing many different jobs before they actually become president.
Also, for your happiness and health do your best not to compare yourself to your peers by remembering their successes or their development doesn't affect yours or make your life any less exciting/ valuable. Everyone is on their own path on their own time.