Regarding the norms by Google and according to multiple sources, it takes at least 6 months for getting good results in SEO (depending on the competitiveness of your industry and popularity of your keywords). You will get the same answer when you approach any SEO specialist or company who is practicing white hat SEO. With improvements in Google algorithms, the SEO industry is now totally changed. Old days are gone now, it's becoming more and more uncertain to predict the output of your efforts for any set of keywords. However, with the strategies I will apply on your websites to mention a few: like optimize URL,meta data and alt text for images.
With these strategies and more, I can increase your site’s organic traffic and more.