readability

I like reading fashion blogs, but I have discussed with my friends, and few of them are interested in politics or entertainment. Please suggest the most readable topics.

I mostly write longer sentences in my native language and Yoast always how red colour in readability. Will using the readability guidelines of Yoast SEO will help in SEO? Basically, Yoast says Use short paragraph, Max 20 word in a line and others readability factors.