I agree with Max. The SEO Framework plugin is a good and easy to use solution. IMHO Yoast is a total overdose and too complex.
Don’t expect that a SEO plugin can be the Holy Grail for your SEO ambitions. It only supports your efforts and it’s not THE thing. If there are no results after a longer period, maybe you review some parts of your website, again. Ranking good in Google in a short time period has become more and more difficult. I don’t know for how long you are working on your site, but you have to be patient.