Just don’t give up, and publish the article ASAP. If you think with this niche you will get success within 1 year, then it’s not true. It may take 2 or 3 year as well, if you think you’re doing something wrong, and reading other marketing blogs who have never done such a thing which you’re doing. So stop reading marketing blogs, just analysis how your competitors are doing.
I don’t wont to give pro blogger names, but they have also started many blogs in side, but did they got achievement like what they have achieve with their main blog? No, because the strategy is always different from one blog to another. The best strategy is analysis your competition site.
The niche you have chosen is very competitive. So all the best.