Step 1: Buy a DSLR camera (Never mind if you have no idea how a DSLR works: just experiment until you figure it out!)
Step 2: Start a blog (Remember, if you buy a DSLR all your pictures will be super high quality; so they definitely belong on the internet for all the world to see!)
Step 3: Start a photography business (Once you complete the first 2 steps, everyone is going to want you to take pictures for them 😉 )
You are now officially a professional photographer! Congratulations!
Step 4: Don’t take this seriously 🙂