Whenever someone new to Internet marketing posts a question about how to start there's usually 2 standard answers:
1 - Follow the money
2 - Follow your passion
The general difference being that you should either decide your business model based on where there's already money flowing and put yourself in front of it, or start with something you're passionate about because there will be others who are also passionate, plus you'll enjoy what you're doing.
Now, at some point there seems to be some confusion about choosing between these two strategies.
If you've found that yourself, here's why......
You don't have to do one or the other - you can factor in BOTH.
There's no ONE right way to be successful and anyone who tells you there is just plain doesn't know what they're saying.
Since we're all individuals and we have different preferences, standards, ethics, experience etc. there will never be one method that fits everyone.
Just because something works for one person doesn't make it the right thing for someone else.
In truth both pieces of advice are sensible - tapping in to an existing flow of money is a sensible choice - however, for some people if they're not interested in the niche then they just won't put the effort in that they need to.
So when you see/hear advice about how to start - just remember that you don't have to pick one method, you can create a model that suits you - that's really the only right way there is.