If your website is built using the Pillar Theme as the basis of the design, the best way to learn the backend is to head over to YouTube and watch the Pillar WordPress Theme playlist;

https://www.youtube.com/playlist?list=PL6VzCcNewv9iwjzU_HMhDg51XP2i_mh6Q

Videos which end users may find most helpful include;

1). Building A Page with Visual Composer

2). Using the Lightbox Gallery Blocks

3). Using the Video Gallery Blocks

4). Using the Clients Post Type

5). Using the Portfolio Post Type

6). Using the Team Post Type

7). Using the Testimonials Post Type

8). Using Tabs and Accordions

9). Using Modals

10). Using the Cards Block

11). Using the Video Background Block

12). Using the Video Player Blocks

13). Using the Pricing Table Block

14). Using the Hover Tiles Block