FWIW, I tell most developers I know to not stress out about their personal blog design and just focus on the value of content. The vast majority of default/built-in blog layouts are just fine. You're not a designer, you're not seeking to show off your design chops with a custom layout – just write good articles.

That said, this particular sort of design where it's not a standard blog theme and not a custom design, but is just tweaked Bootstrap just seems neither here nor there.