How to make a page with a side menu using bootstrap?

Question

HTML

Good evening everyone. Started making up the page. Decided to use bootstrap. But the fact is that so far I have used it in classic landing pages, where it fits perfectly and did not raise any questions.

Here I have a side menu. Question: how is it most optimized to make up? To make it clear, logical and beautiful? So far, I started by creating a row for all the content of the page, respectively, I selected three columns for the side menu, and 9 for the main content. And already in these 9 columns I use a 12-column approach for content layout. How justified is this? What shoals can emerge later?

Answer 1

1. You can nest rows (row) in columns (col).
2. Logically:
2.1. The header is the logo (col) and the rest (col), inside which is a line (or two) with the main navigation and contacts.
2.2. The main content of the site is also a line, inside which is the navigation (column), and next to it is the content of the page (also a column), inside which are lines with even more nested content.
In short, on the buta, this can be assembled very quickly.