The results are not typical and it differs from person to person depending on the action you take and the research you have put in. The most important part would be to know your audience because those are the people you are writing to.
Assuming you have done the keyword research, know your audience, and writing quality and valuable articles, doing on-page, off-page, and technical SEO, and you write such an article every day - you may see your keywords ranking well in the search engines and make some sales.
You may have faster results or slower results - the secret ingredient is you and consistency. I will also recommend sharing your posts on social media.
Generally, it is hard work, but possibly one of the most rewarding and valuable things you can achieve. It is digital real estate and something you own.