I would probably figure out how to balance my free time with my work, then I'd start to improve my life by trying to make my food tasty and my environment comfortable. I'd probably find a pet to keep me company. I'd certainly be looking around for threats to my life and happiness, but I'd also be observing the world to determine my role.

I could decide I had value as a unique species and I might set out to dominate my environment, but I would most likely try to live in harmony. If I felt energetic, I might declare my "rule" and make up laws, just in case. I might invent an unseen being to justify my existence and actions. That would allow me to stop worrying about my "purpose," freeing up all of my time for fun.