I am also new but I figure that the best for you would be something that you really passionate about... I think the readers will choose the topics of their liking anyways and if they match with your passion...that's a perfect combination. I for myself choose topics which I have enough material to work with and I see as my hobby, not as work. Hopefully its the right strategy to keep interest... Steemit is a very funny place that will develop overtime I think... there is a lot of noise of course but which social media platform isn't full of noise...