There are lots of ways to become an SEO-friendly content Writer.
following are the ways you should do practice on daily basis.
Write Every Day. Even if it's only a single paragraph.
Read Every Day.
Exercise Every Day.
Sleep with a Notebook.
Develop a Routine.
Stop While You're Ahead.
Work and Re-Work and Re-Work Some More.
Write for Yourself First. use LSI keywords and focused keywords in your content, and the most important thing is that use SEO friendly tools and here is the best site for practicing Seo friendly tools that are not only useful in improving your content writing skills but can help you to rank your content in the search engine.