Miyazaki is a free multi-purpose WordPress theme from Anders Norén. He created this theme for any kind of image-based blog, magazine, and especially, a portfolio. The key temperament of Miyazaki is its large, daring and prominent design, which can show off your photos effectively.
This theme is easy to use and set up so every user is likely to get everything configured in a short time. Moreover, it's friendly with all devices and browser so you can use it anywhere and by any mean.
If you need a simple and clear portfolio or rich-image blog, Miyazaki is a good choice. But it's not feature-rich so you should consider carefully.
In conclusion, I'd like to recommend this theme for a non-professional user because of its ease of use and customization. It's also optimized for SEO and compatible with Gutenberg editor. The speed is not fast but still acceptable.