How to properly set up Less using Bootstrap?

Question

css

Good afternoon! Help advice. The new project needs to be done with less. I want to use the bootstrap grid and maybe something else). I know how to use bootstrap for simple layout. But in less, I'm still just learning and I want to initially organize the project correctly. There are bootstrap+less tutorials on YouTube, but in these tutorials he includes bootstrap.css. And in style.less imports the bootstrap styles @import (inline) "../css/bootstrap.css";
And my question is, what is better to use: the bootstrap.css file or download bootstrap less and include only the necessary components?
But in principle, only the necessary components can be left in bootstrap.css.
Please tell me in which less projects it is better to use one or another type of bootstrap.