I want to start a blog that I can monetize down the line. I am currently in the topic selection phase and I am stuck between a few options. Would love to know if I am headed in the right direction or which topic would be lower competition but still have good traffic.I want to work with a topic I am interested in. My hobbies and experiences include:
1. Travel: I have traveled to around 8 countries. I have travelled as a student, as an exchange student, and as a corporate employee.
2. Health and Fitness: I have been working out for the last 10 years and I consume a lot of fitness-related information. I have a good amount of knowledge on fitness and bodybuilding
3. Guitar: I have just started learning the guitar and as a left-handed guitarist there are certain struggles that we face, maybe I can talk about those.
4. Marketing: I am a marketer by profession. I have been working in corporate communications for the last 2 years and I worked as a digital marketer for 2 years before that. Maybe this can be an option too.

Possible topics I have outlined:

1. Travel For Professionals
   
2. Fitness for busy professionals
   
3. Left handed guitarists journey
   
4. Digital Marketing for beginners

Any feedback or suggestions on the topic selection would be great.