You don't have to be passionate about what you're selling.

Let’s say you’re passionate about ice skating, but you suck at ice skating. I would not recommend pursuing a career in it. Just because you’re passionate about something does not mean you should try to start a business in it.

I always hear people say things like, “Follow your passion.”

As a general rule do not follow your passion.

Follow your skills.

Look at the skills you have or are currently building. Which skills are valuable? Do you have any skills that people pay to learn? Do you have any skills employers look for? Follow your skills first. Once you’re successful utilizing your skills you can enjoy the other parts of your life by pursing a passion. If your passion and skills intersect then you have something great on your hands.