SEO / Content Expert for WordPress Plugin Business

Hello I've a WordPress plugin business, and I'm a developer & founder of these plugins. I need someone who can research the keyword, keep checking old posts, update them, decide new posts, write them with a good quality etc. Basically I'll leave 2 plugin website to your hands and I'll expect you to handle all the content/seo related things for our 2 website. https://affiliatexblocks.com/ https://craftaddons.com/ (new one, no content yet) So basically you can check documentations, blogs. We have some screen records, images etc in our blog posts that you can see. My main measurement is the traffic and conversion. So you need to focus on the things that we will get traffic from our keywords. I'm looking for someone can ~part time with 300$ Monthly budget. I need you to explain me what you can do, how many article you can write in a month, how long these articles will be, also examples from your "related" blog posts. WordPress-specific posts have higher priority.