How to add/embed star ratings to your site (not for user reviews tho)

Hi,

So I a have Squarespace site it use for review movies and I want to find a better way to add my star ratings. At least in a way that Google picks up and add to their SEO for my site. I kind of gotten tired of the way I usally format them but would love to find a better, easier way to add star ratings for my site. 

Here's a recent review, for example. https://rendyreviews.com/movie-reviews/alien-romulus-review

Please let me know if you have any suggestions on what i can do or services I can use. Thanks!

--Rendy