The best way to take notes on Zoom is by creating your own screenshots. If you don’t know how to create a screenshot (don’t worry it’s really easy), these links will take you to online tutorials that will explain how to create a screenshot using the device that you will be using during the talk.
If you use an iPhone go here.
If you use an Android go here.
If you use a Mac go here.
If you use Windows go here.
If you use an iPad go here.
You might also want to see this article in PC Magazine on making screenshots using any device.