Many of us have a problem with figuring out what to do in life. We do a little bit of everything, we love to explore, we have a unique perspective of the world and our own life experience. INFP is a lot of things but shallow is not one of them.
We suck at one thing bad...and that is following through. Why!? The answer is simple:
a) We get discouraged for various reasons, most often other people's opinions drag us down.
b) Sticking to something we already figured out is boring as hell.
So the question is: "What should I do if I love experiencing and have all these opinions, feelings and perspectives inside of myself?"
The answer: You are meant to manifest all that through creativity and share it with the rest of the world.
It is that simple. That is what INFPs are born to do. To experience and then express that point of view in some way that touches other people.
This can be any form of expression from art to activism...writing, music, psychology and so on.
To get good at something one must be ready to invest more then 10000 hours. The only thing an INFP needs to invest 10K hours into is his or her method of expressing the inner world.
If you think writing is perfect for you then practice that and invest the 10000 hours while still doing other stuff, experiencing life. This doesn't have to be your job, just some fun fulfilling thing you do. Life is not worth living without it.
this is my opinion. Discuss.