Quite like the below tutorial!
https://testdriven.io/blog/developing-a-single-page-app-with-flask-and-vuejs/
of course, you have the official docs too:
https://vuejs.org/v2/guide/
also a good start:
https://appendto.com/2016/11/a-friendly-introduction-to-vue-js/
kudos to https://www.fullstackpython.com/vuejs.html for a comprehensive list of resources!