The interface is really simple and easy to use. The elements for the video can be found on the left and the best part is the blue button you can click and check out the work you have done so far. They also offer 14-day trial period which is great as you can test the software and see if this is something that suits your needs. The trial version is enough to get a rough idea, what exactly this software can do for you.
Check out these websites, pick one, and create your own whiteboard explainer video! Have fun