Theme development

I have a Drupal 8 site and Bootstrap 3 theme (SASS)

I use the following Bootswatch theme on my site :

https://bootswatch.com/3/flatly/_bootswatch.scss

There are these 2 lines in the file :

    $web-font-path: "https://fonts.googleapis.com/css?family=Lato:400,700,400italic" !default;
    @import url($web-font-path);

I used this site to download the corresponding Google Fonts archive :

I have a site with Drupal 8.7 and Bootstrap 3.4.1 in SASS.

I have created a Bootstrap SASS subtheme, I want to host Font Awesome locally.

I downloaded and decompressed the archive at this address :

https://fontawesome.com/how-to-use/on-the-web/setup/hosting-font-awesome...

In the directory of my subtheme :

    /bootstrap_subtheme_front_office_old/fonts

If I go to my site, the Awesome Font does not work.

I have a site with Drupal 8 and Barrio (Bootstrap 4) in SASS.

How to add the theme "Flatly" in my subtheme ?

https://bootswatch.com/

So I am converting one of my D7 sites to D8 and have decided to go all in on using the new layout builder. I think it's really awesome and will be great for our content editors. I'm wondering if anyone is aware of any themes on the marketplace anywhere that already come with some layout builder layouts perhaps using Bootstrap or even better some custom block types and TWIG templates that I could then embed predefined widgets already styled in the themes style into layout builder.

Have fresh Drupal 8 install with Bootstrap 3 and sub-theme created as per: https://www.webwash.net/getting-started-bootstrap-drupal-8/

Have a couple articles listed in the homepage in <div class="views-row">. As per above tutorial, I'm taking variable from bootstrap/assets/stylesheets/bootstrap/_variables.scss and customizing them in scss/_default-variables.scss

Just trying to put a border on this class but having a hard time figuring out where exactly to do it.

I'm struggling to override the template on the admin interface for a content type. I'm going to need to do several modifications to the edit form to meet the editor's requirements, however, I seem to be unable to get this to override.

The page source gives me the following