The only skills you need to be an entrepreneur are the ability to fail, to have ideas, to sell those ideas, to execute on them, and to be persistent so even as you fail you learn and move onto the next adventure.
The best way I have ever found to fill that hole is not to seek external motivations to fill the emptiness, but to ignite the internal fire that will never go out. To light up my own inner sky.
Only free time, imagination, creativity, and an ability to disappear will help you deliver value that nobody ever delivered before in the history of mankind.
If you try to get 1% better each day at your health, at your relationships and the way you treat people, at your creativity, and at turning despair into gratitude, then that 1% compounds into an amazing person. Do that 1%. Take one action. Even if the actions is for one minute. The 1/1/1 strategy.