Hi,
To add Sidebar:
Step 1: Add the following to Additional CSS in customizer
.woocommerce .site-content {
width: 63.2%;
}
———————-
Step 2: and in woocommerce.php inside theme folder
copy the get_footer line and replace get_footer with get_sidebar and place it above get_footer line.
The bottom two lines will look same just like in file page.php which is also inside theme folder, so you can copy from there too.