Hi Melissa,
Thanks so much for reaching out!
Fortunately, custom sidebars are pretty straightforward to set up, and you can add them to templates so they will only display on certain pages.
We have a guide to help you with customizing templates. Once you’ve got the template set up, you can create a custom sidebar by following these instructions, and then add it to the template by using get_sidebar. Once this has been done, you should see your custom sidebar appear in the widget area, where you can drag and drop widgets into it like any other sidebar.
Let me know how it goes and if you have any other questions along the way!
Thanks,
Jaime