it's really simple:

the first step is on page seo where you write content based on keywords that are high value based on CPC, and start creating topic landing pages. anchor link new landing pages to rank keywords then move on to technical seo. the technical seo go focus on is to extend the knowledge basis that the search engine algorithm has for you. do sitemaps XML & HTML, robots.txt, and schema markup. that's all. don't focus on anything else, but don't forget IMG alt optimization, speed optimization, and conversion optimization. lastly is off page seo. if you have a local website then the first page results for your keywords will have the listings necessary to get high quality backlinks to your website. if you aren't a local site forget about backlinks you don't need them.