Add a markdown file to _posts/ with the naming convention:
YYYY-MM-DD-title-of-post.md
Start each file with frontmatter:
---
layout: post
title: "Your Post Title"
---
Then just write markdown.
Drop images into assets/blog/ and reference them like this:
Inline math: $E = mc^2$
Display math:
\[\mathcal{L}(\theta) = \sum_{i=1}^{N} \log p_\theta(x_i)\]A Boltzmann distribution:
\[p(x) = \frac{1}{Z} e^{-\beta H(x)}\]]]>