Fix Bootstrap 4 HTML Theme Responsive Issues (Simple Task)

General information for the website: Fix Responsive Issues of the theme I have

Kind of development: Customization of existing website

Num. of web pages/modules: 1

Description of every page/module: You are free to delete CSS that are not necessary or modify the HTML of my Bootstrap 4 HTML theme.

The goal of the task is to tweak the codes to make it perfect responsive on all devices.

Here are the things I am looking for to fix.
1. the text are moving out to its container - http://prntscr.com/8vvd7f

2. the sidebars are appearing above the main content grids you can use pul and push bootstrap 4 css classes here https://scotch.io/tutorials/reorder-css-columns-using-bootstrap to fix it -

check it - http://prntscr.com/8vvdom

3. Also grids are overlapping on small viewports - http://prntscr.com/8vvdxa