Are there any tips for text formatting?

I have a problem - I recently completed a major website project, but I lack experience in placing emphasis in the written text. It ends up being a continuous block of text, and I am unable to achieve the goals of a copywriter.Have somebody any advice? The example in photo or url : site и photo

I looked at all sorts of: How to fix your text in 10 seconds and so on, but I would like to hear normal advice from real people

Are you need a SEO formatted post?