Choosing the right KW is the base of all SEO efforts. You need a more specific(customer-centric) KW that attracts searchers and is easy to rank. Let's talk more in my chatbox.
Your content isn't getting ranked just because of choosing the wrong keyword. It's 2024 and you're using key-word strategy from 2014, that's not going to work in today's competitive business world.
SEO Keyword Research: