One popular and effectively modular way to structure Sass projects is the 7-1 pattern. If your internship or eventual place of employment uses Sass, there's a high chance they use some variation of this type of architecture. So let's make sure you're familiar with it before moving on!

7_1SassArchitecture.scss

// sass-utils
@import 'sass-utils/variables';
@import 'sass-utils/mixins';

// components
@import 'components/button'; // or any other component created...

// layout
@import 'layout/header';
@import 'layout/main';

// base
@import 'base/reset';
@import 'base/typography';