There is nothing outside of yourself that calls to you. (except your mother, and you should call her back).
Otherwise, if you believe you are a blank slate to begin with, then everything you sense builds upon each new sensory experience.
At some point in time, you will project beyond yourself and perceive this as a calling. It might be life, a profession or a moral epiphany . But all of this comes from within.
This means that you have to do a bit of work to discover this calling. It might come to you as any wild animal might, but otherwise any experience worth having requires effort.
If you answer this call to yourself, then you are also following your bliss. Therein lies the happiness you are seeking.
Live an Untethered Life 
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