SEO is an Ongoing Process and needs time to take effect (nothing is instantaneous). Most of my clients see improvements within 3 to 4 months after the work is completed depending upon their keyword competitiveness, niche, and website age.

Ranking Depends on different many factors. Normally it takes on an average of 4 to 6 months for medium-competitive keywords. For highly competitive keywords it will take up to 6 to 8 months and for the low competitive keywords, it would take around 2 months to see improvement in your rankings.

Because competitors never stop working and we have to keep updating keywords and optimize the web pages to rank above them. Google always crawl for new data to index and rank website. On-page SEO is a one-time task but OFF page & Technical SEO are ongoing tasks.

I would fix all the OnPage & Technical SEO issues on your site and also optimize it for the desired keywords by optimizing Title Tags, Heading Tags, Image ALT Attributes, and Meta Desc. I won't write the extra content in this gig to target new keywords, if required it would be charged separately.