You can create websites that resemble Windows 10 look with Fluent Kit - a free front-end framework based on Bootstrap 4.
It works just like Bootstrap so you should be able to dive into it right away.
In case you don't know what Fluent Design looks like, here's a video overview:
https://www.youtube.com/watch?v=vcBGj4R7Fo0
And here's a link to the Fluent Kit:
https://nespero.com/
