I'm gonna ask the obvious question here.. Did you check to see if your domain is blacklisted? Are your pages properly indexed? Are all your pages optimized for mobile use? Do you use any other type of media (video) within your posts? The list goes on. Try ranking for a long tail keyword with little to no comp. If that don't rank within a week then your domain or site could be blacklisted
Well, there are many factors why you're not ranking. In terms of off-page SEO, you might not be building quality links. In on-page SEO, the reason could be your KW selection or thin content. In my opinion, you have to make sure that your site looks good first and optimized for mobile use.