Fortunately, life is a huge neural net.
And the universe is a machine designed to bring everyone what they desire. (actually it is what they put their most attention into)
So, to be the most help and benefit to the world, you should seek out your highest joy. This does not involve hedonism, unless as a step for you to realize that hedonistic pleasures are short lived with many penalties and problems.
If everyone seeked out there highest joy, than the world will transform to be a paradise for everyone.
Not really since there is a limited supply and a great demand for specific things. Evolution has made sure of this. Most people, by natural law, stay in the sidelines.