How to create Shopify theme ?

Hello
I like to learn how to create Shopify theme. I’m familiar with HTML, CSS and Bootstrap. How do I get started ?

I prefer detailed instructions and video lessons.

Thanks
Peter

You should buy the course and learn about it https://www.udemy.com/course/build-a-shopify-theme-from-scratch/

That’s what’s I’m looking for. Thank you.