I've just started using a Whiteboard tool and the interface is overwhelming. What are some ways to quickly get up to speed with the features?

FreeForm is a free collaborative whiteboard app for Mac, iPad, and iPhone. To brainstorm and plan projects, sketch, import other media, and place shapes and text boxes. Exchange boards with up to 100 individuals to work together in real time.

Miro, Microsoft Whiteboard, Jamboard from Google, Mural, Zoom, and more provide mobile applications for smooth working for Whiteboards on mobile devices.

The work done in Microsoft Whiteboard can be exported to OneDrive, after which it automatically saves the work done or changes made.

To improve the learning experience, teachers can use the feature of pulling images, stickers, shapes, and content from other documents which make learning for students' fun.

The paid versions have no restrictions on any tools or features you might want to use for your work. However, Microsoft Whiteboard and Jamboard by Google are free tools that provide you with every feature without any purchases.