I am curious about your workflow, are you writing your blog posts in markdown, the using an online markdown to html converter, then copy pasting the output onto your website?
Also this is a good resource for learning some CSS: https://css-tricks.com/
They have some very helpful guides for things like flex boxes: https://css-tricks.com/snippets/css/a-guide-to-flexbox/
You can also buy computer monitors up to about 32" to use as a TV. Above 32" all the OLED displays seem to be curved or ultra wide.